diff --git a/res/css/structures/auth/_Login.scss b/res/css/structures/auth/_Login.scss
index d4b5e7402c7..2cf62765570 100644
--- a/res/css/structures/auth/_Login.scss
+++ b/res/css/structures/auth/_Login.scss
@@ -15,17 +15,6 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-.mx_Login_field {
-    width: 100%;
-    box-sizing: border-box;
-    border-radius: 3px;
-    border: 1px solid $strong-input-border-color;
-    font-weight: 300;
-    font-size: 13px;
-    padding: 9px;
-    margin-bottom: 14px;
-}
-
 .mx_Login_submit {
     @mixin mx_DialogButton;
     width: 100%;
@@ -69,74 +58,24 @@ limitations under the License.
     color: $warning-color;
     font-weight: bold;
     text-align: center;
-/*
-    height: 24px;
-*/
     margin-top: 12px;
     margin-bottom: 12px;
 }
 
 .mx_Login_type_container {
     display: flex;
-    margin-bottom: 14px;
+    align-items: center;
     color: $authpage-primary-color;
+
+    .mx_Field {
+        margin: 0;
+    }
 }
 
 .mx_Login_type_label {
     flex-grow: 1;
-    line-height: 35px;
 }
 
 .mx_Login_type_dropdown {
-    display: inline-block;
-    min-width: 170px;
-    align-self: flex-end;
-    flex: 1 1 auto;
-}
-
-.mx_Login_field_prefix {
-    height: 38px;
-    padding: 0px 5px;
-    line-height: 38px;
-
-    background-color: #eee;
-    border: 1px solid #c7c7c7;
-    border-right: 0px;
-    border-radius: 3px 0px 0px 3px;
-
-    text-align: center;
-}
-
-.mx_Login_field_has_prefix {
-    border-top-left-radius: 0px;
-    border-bottom-left-radius: 0px;
-}
-
-.mx_Login_phoneSection {
-    display:flex;
-}
-
-.mx_Login_phoneCountry {
-    margin-bottom: 14px;
-
-    /* To override mx_Login_field_prefix */
-    text-align: left;
-    padding: 0px;
-    background-color: $primary-bg-color;
-}
-
-.mx_Login_field_prefix .mx_Dropdown_input {
-    /* To use prefix border instead of dropdown border */
-    border: 0;
-}
-
-.mx_Login_phoneCountry .mx_Dropdown_option {
-    /* To match height of mx_Login_field */
-    height: 38px;
-    line-height: 38px;
-}
-
-.mx_Login_phoneCountry .mx_Dropdown_option img {
-    margin: 3px;
-    vertical-align: top;
+    min-width: 200px;
 }
diff --git a/res/css/views/auth/_AuthBody.scss b/res/css/views/auth/_AuthBody.scss
index e8f49cdbd25..e7a6e04e8b6 100644
--- a/res/css/views/auth/_AuthBody.scss
+++ b/res/css/views/auth/_AuthBody.scss
@@ -78,16 +78,16 @@ limitations under the License.
     margin-bottom: 10px;
 }
 
-.mx_AuthBody_fieldRow > * {
+.mx_AuthBody_fieldRow > .mx_Field {
     margin: 0 5px;
     flex: 1;
 }
 
-.mx_AuthBody_fieldRow > *:first-child {
+.mx_AuthBody_fieldRow > .mx_Field:first-child {
     margin-left: 0;
 }
 
-.mx_AuthBody_fieldRow > *:last-child {
+.mx_AuthBody_fieldRow > .mx_Field:last-child {
     margin-right: 0;
 }
 
diff --git a/res/css/views/elements/_Field.scss b/res/css/views/elements/_Field.scss
index 02f0e548fb0..4a74262fd4f 100644
--- a/res/css/views/elements/_Field.scss
+++ b/res/css/views/elements/_Field.scss
@@ -17,8 +17,16 @@ limitations under the License.
 /* TODO: Consider unifying with general input styles in _light.scss */
 
 .mx_Field {
+    display: flex;
     position: relative;
     margin: 1em 0;
+    border-radius: 4px;
+    transition: border-color 0.25s;
+    border: 1px solid $input-border-color;
+}
+
+.mx_Field_prefix {
+    border-right: 1px solid $input-border-color;
 }
 
 .mx_Field input,
@@ -27,9 +35,10 @@ limitations under the License.
     font-weight: normal;
     font-family: $font-family;
     font-size: 14px;
+    border: none;
+    // Even without a border here, we still need this avoid overlapping the rounded
+    // corners on the field above.
     border-radius: 4px;
-    transition: border-color 0.25s;
-    border: 1px solid $input-border-color;
     padding: 8px 9px;
     color: $primary-fg-color;
     background-color: $primary-bg-color;
@@ -55,11 +64,14 @@ limitations under the License.
     pointer-events: none;
 }
 
+.mx_Field:focus-within {
+    border-color: $input-focused-border-color;
+}
+
 .mx_Field input:focus,
 .mx_Field select:focus,
 .mx_Field textarea:focus {
     outline: 0;
-    border-color: $input-focused-border-color;
 }
 
 .mx_Field input::placeholder,
@@ -99,7 +111,8 @@ limitations under the License.
 .mx_Field input:not(:placeholder-shown) + label,
 .mx_Field textarea:focus + label,
 .mx_Field textarea:not(:placeholder-shown) + label,
-.mx_Field select + label /* Always show a select's label on top to not collide with the value */ {
+.mx_Field select + label /* Always show a select's label on top to not collide with the value */,
+.mx_Field_labelAlwaysTopLeft label {
     transition:
         font-size 0.25s ease-out 0s,
         color 0.25s ease-out 0s,
@@ -127,3 +140,14 @@ limitations under the License.
     background-color: $field-focused-label-bg-color;
     color: $greyed-fg-color;
 }
+
+// Customise other components when placed inside a Field
+
+.mx_Field .mx_Dropdown_input {
+    border: initial;
+    border-radius: initial;
+}
+
+.mx_Field .mx_CountryDropdown {
+    width: 67px;
+}
diff --git a/src/components/structures/auth/ForgotPassword.js b/src/components/structures/auth/ForgotPassword.js
index 58deb380e38..f0a53e5063c 100644
--- a/src/components/structures/auth/ForgotPassword.js
+++ b/src/components/structures/auth/ForgotPassword.js
@@ -230,6 +230,8 @@ module.exports = React.createClass({
     },
 
     renderForgot() {
+        const Field = sdk.getComponent('elements.Field');
+
         let errorText = null;
         const err = this.state.errorText || this.props.defaultServerDiscoveryError;
         if (err) {
@@ -275,23 +277,33 @@ module.exports = React.createClass({
             {errorText}
             <form onSubmit={this.onSubmitForm}>
                 <div className="mx_AuthBody_fieldRow">
-                    <input className="mx_Login_field" type="text"
+                    <Field
+                        id="mx_ForgotPassword_email"
                         name="reset_email" // define a name so browser's password autofill gets less confused
+                        type="text"
+                        label={_t('Email')}
                         value={this.state.email}
                         onChange={this.onInputChanged.bind(this, "email")}
-                        placeholder={_t('Email')} autoFocus />
+                        autoFocus
+                    />
                 </div>
                 <div className="mx_AuthBody_fieldRow">
-                    <input className="mx_Login_field" type="password"
+                    <Field
+                        id="mx_ForgotPassword_password"
                         name="reset_password"
+                        type="password"
+                        label={_t('Password')}
                         value={this.state.password}
                         onChange={this.onInputChanged.bind(this, "password")}
-                        placeholder={_t('Password')} />
-                    <input className="mx_Login_field" type="password"
+                    />
+                    <Field
+                        id="mx_ForgotPassword_passwordConfirm"
                         name="reset_password_confirm"
+                        type="password"
+                        label={_t('Confirm')}
                         value={this.state.password2}
                         onChange={this.onInputChanged.bind(this, "password2")}
-                        placeholder={_t('Confirm')} />
+                    />
                 </div>
                 <span>{_t(
                     'A verification email will be sent to your inbox to confirm ' +
diff --git a/src/components/views/auth/PasswordLogin.js b/src/components/views/auth/PasswordLogin.js
index 1ad93f60751..4b095d405f7 100644
--- a/src/components/views/auth/PasswordLogin.js
+++ b/src/components/views/auth/PasswordLogin.js
@@ -138,7 +138,8 @@ class PasswordLogin extends React.Component {
         this.props.onUsernameBlur(ev.target.value);
     }
 
-    onLoginTypeChange(loginType) {
+    onLoginTypeChange(ev) {
+        const loginType = ev.target.value;
         this.props.onError(null); // send a null error to clear any error messages
         this.setState({
             loginType: loginType,
@@ -169,67 +170,70 @@ class PasswordLogin extends React.Component {
     }
 
     renderLoginField(loginType) {
-        const classes = {
-            mx_Login_field: true,
-        };
+        const Field = sdk.getComponent('elements.Field');
+
+        const classes = {};
 
         switch (loginType) {
             case PasswordLogin.LOGIN_FIELD_EMAIL:
                 classes.error = this.props.loginIncorrect && !this.state.username;
-                return <input
-                    className="mx_Login_field"
-                    ref={(e) => {this._loginField = e;}}
+                return <Field
+                    className={classNames(classes)}
+                    id="mx_PasswordLogin_email"
+                    ref={(e) => { this._loginField = e; }}
+                    name="username" // make it a little easier for browser's remember-password
                     key="email_input"
                     type="text"
-                    name="username" // make it a little easier for browser's remember-password
-                    onChange={this.onUsernameChanged}
-                    onBlur={this.onUsernameBlur}
+                    label={_t("Email")}
                     placeholder="joe@example.com"
                     value={this.state.username}
+                    onChange={this.onUsernameChanged}
+                    onBlur={this.onUsernameBlur}
                     autoFocus
                 />;
             case PasswordLogin.LOGIN_FIELD_MXID:
                 classes.error = this.props.loginIncorrect && !this.state.username;
-                return <input
+                return <Field
                     className={classNames(classes)}
-                    ref={(e) => {this._loginField = e;}}
+                    id="mx_PasswordLogin_username"
+                    ref={(e) => { this._loginField = e; }}
+                    name="username" // make it a little easier for browser's remember-password
                     key="username_input"
                     type="text"
-                    name="username" // make it a little easier for browser's remember-password
+                    label={SdkConfig.get().disable_custom_urls ?
+                        _t("Username on %(hs)s", {
+                            hs: this.props.hsUrl.replace(/^https?:\/\//, ''),
+                        }) : _t("Username")}
+                    value={this.state.username}
                     onChange={this.onUsernameChanged}
                     onBlur={this.onUsernameBlur}
-                    placeholder={SdkConfig.get().disable_custom_urls ?
-                                      _t("Username on %(hs)s", {
-                                        hs: this.props.hsUrl.replace(/^https?:\/\//, ''),
-                                      }) : _t("Username")}
-                    value={this.state.username}
                     autoFocus
                 />;
             case PasswordLogin.LOGIN_FIELD_PHONE: {
                 const CountryDropdown = sdk.getComponent('views.auth.CountryDropdown');
-                classes.mx_Login_field_has_prefix = true;
                 classes.error = this.props.loginIncorrect && !this.state.phoneNumber;
-                return <div className="mx_Login_phoneSection">
-                    <CountryDropdown
-                        className="mx_Login_phoneCountry mx_Login_field_prefix"
-                        onOptionChange={this.onPhoneCountryChanged}
-                        value={this.state.phoneCountry}
-                        isSmall={true}
-                        showPrefix={true}
-                    />
-                    <input
-                        className={classNames(classes)}
-                        ref={(e) => {this._loginField = e;}}
-                        key="phone_input"
-                        type="text"
-                        name="phoneNumber"
-                        onChange={this.onPhoneNumberChanged}
-                        onBlur={this.onPhoneNumberBlur}
-                        placeholder={_t("Mobile phone number")}
-                        value={this.state.phoneNumber}
-                        autoFocus
-                    />
-                </div>;
+
+                const phoneCountry = <CountryDropdown
+                    value={this.state.phoneCountry}
+                    isSmall={true}
+                    showPrefix={true}
+                    onOptionChange={this.onPhoneCountryChanged}
+                />;
+
+                return <Field
+                    className={classNames(classes)}
+                    id="mx_PasswordLogin_phoneNumber"
+                    ref={(e) => { this._loginField = e; }}
+                    name="phoneNumber"
+                    key="phone_input"
+                    type="text"
+                    label={_t("Phone")}
+                    value={this.state.phoneNumber}
+                    prefix={phoneCountry}
+                    onChange={this.onPhoneNumberChanged}
+                    onBlur={this.onPhoneNumberBlur}
+                    autoFocus
+                />;
             }
         }
     }
@@ -245,6 +249,8 @@ class PasswordLogin extends React.Component {
     }
 
     render() {
+        const Field = sdk.getComponent('elements.Field');
+
         let forgotPasswordJsx;
 
         if (this.props.onForgotPasswordClick) {
@@ -286,12 +292,9 @@ class PasswordLogin extends React.Component {
         }
 
         const pwFieldClass = classNames({
-            mx_Login_field: true,
             error: this.props.loginIncorrect && !this.isLoginEmpty(), // only error password if error isn't top field
         });
 
-        const Dropdown = sdk.getComponent('elements.Dropdown');
-
         const loginField = this.renderLoginField(this.state.loginType);
 
         let loginType;
@@ -299,14 +302,32 @@ class PasswordLogin extends React.Component {
             loginType = (
                 <div className="mx_Login_type_container">
                     <label className="mx_Login_type_label">{ _t('Sign in with') }</label>
-                    <Dropdown
+                    <Field
                         className="mx_Login_type_dropdown"
+                        id="mx_PasswordLogin_type"
+                        element="select"
                         value={this.state.loginType}
-                        onOptionChange={this.onLoginTypeChange}>
-                            <span key={PasswordLogin.LOGIN_FIELD_MXID}>{ _t('Username') }</span>
-                            <span key={PasswordLogin.LOGIN_FIELD_EMAIL}>{ _t('Email address') }</span>
-                            <span key={PasswordLogin.LOGIN_FIELD_PHONE}>{ _t('Phone') }</span>
-                    </Dropdown>
+                        onChange={this.onLoginTypeChange}
+                    >
+                        <option
+                            key={PasswordLogin.LOGIN_FIELD_MXID}
+                            value={PasswordLogin.LOGIN_FIELD_MXID}
+                        >
+                            {_t('Username')}
+                        </option>
+                        <option
+                            key={PasswordLogin.LOGIN_FIELD_EMAIL}
+                            value={PasswordLogin.LOGIN_FIELD_EMAIL}
+                        >
+                            {_t('Email address')}
+                        </option>
+                        <option
+                            key={PasswordLogin.LOGIN_FIELD_PHONE}
+                            value={PasswordLogin.LOGIN_FIELD_PHONE}
+                        >
+                            {_t('Phone')}
+                        </option>
+                    </Field>
                 </div>
             );
         }
@@ -318,15 +339,19 @@ class PasswordLogin extends React.Component {
                     {editLink}
                 </h3>
                 <form onSubmit={this.onSubmitForm}>
-                    { loginType }
-                    { loginField }
-                    <input className={pwFieldClass} ref={(e) => {this._passwordField = e;}} type="password"
+                    {loginType}
+                    {loginField}
+                    <Field
+                        className={pwFieldClass}
+                        id="mx_PasswordLogin_password"
+                        ref={(e) => { this._passwordField = e; }}
+                        type="password"
                         name="password"
-                        value={this.state.password} onChange={this.onPasswordChanged}
-                        placeholder={_t('Password')}
+                        label={_t('Password')}
+                        value={this.state.password}
+                        onChange={this.onPasswordChanged}
                     />
-                    <br />
-                    { forgotPasswordJsx }
+                    {forgotPasswordJsx}
                     <input className="mx_Login_submit"
                         type="submit"
                         value={_t('Sign in')}
diff --git a/src/components/views/auth/RegistrationForm.js b/src/components/views/auth/RegistrationForm.js
index d031dc7bdd0..4275a24b49e 100644
--- a/src/components/views/auth/RegistrationForm.js
+++ b/src/components/views/auth/RegistrationForm.js
@@ -306,6 +306,8 @@ module.exports = React.createClass({
     },
 
     render: function() {
+        const Field = sdk.getComponent('elements.Field');
+
         let yourMatrixAccountText = _t('Create your Matrix account');
         if (this.props.hsName) {
             yourMatrixAccountText = _t('Create your Matrix account on %(serverName)s', {
@@ -338,14 +340,16 @@ module.exports = React.createClass({
                 _t("Email (optional)");
 
             emailSection = (
-                <div>
-                    <input type="text" ref="email"
-                        placeholder={emailPlaceholder}
-                        defaultValue={this.props.defaultEmail}
-                        className={this._classForField(FIELD_EMAIL, 'mx_Login_field')}
-                        onBlur={this.onEmailBlur}
-                        value={this.state.email} />
-                </div>
+                <Field
+                    className={this._classForField(FIELD_EMAIL)}
+                    id="mx_RegistrationForm_email"
+                    ref="email"
+                    type="text"
+                    label={emailPlaceholder}
+                    defaultValue={this.props.defaultEmail}
+                    value={this.state.email}
+                    onBlur={this.onEmailBlur}
+                />
             );
         }
 
@@ -353,40 +357,33 @@ module.exports = React.createClass({
         const CountryDropdown = sdk.getComponent('views.auth.CountryDropdown');
         let phoneSection;
         if (threePidLogin && this._authStepIsUsed('m.login.msisdn')) {
-            const phonePlaceholder = this._authStepIsRequired('m.login.msisdn') ?
+            const phoneLabel = this._authStepIsRequired('m.login.msisdn') ?
                 _t("Phone") :
                 _t("Phone (optional)");
-            phoneSection = (
-                <div className="mx_Login_phoneSection">
-                    <CountryDropdown ref="phone_country"
-                        className="mx_Login_phoneCountry mx_Login_field_prefix"
-                        value={this.state.phoneCountry}
-                        isSmall={true}
-                        showPrefix={true}
-                        onOptionChange={this.onPhoneCountryChange}
-                    />
-                    <input type="text" ref="phoneNumber"
-                        placeholder={phonePlaceholder}
-                        defaultValue={this.props.defaultPhoneNumber}
-                        className={this._classForField(
-                            FIELD_PHONE_NUMBER,
-                            'mx_Login_phoneNumberField',
-                            'mx_Login_field',
-                            'mx_Login_field_has_prefix',
-                        )}
-                        onBlur={this.onPhoneNumberBlur}
-                        value={this.state.phoneNumber}
-                    />
-                </div>
-            );
+            const phoneCountry = <CountryDropdown
+                value={this.state.phoneCountry}
+                isSmall={true}
+                showPrefix={true}
+                onOptionChange={this.onPhoneCountryChange}
+            />;
+
+            phoneSection = <Field
+                className={this._classForField(FIELD_PHONE_NUMBER)}
+                id="mx_RegistrationForm_phoneNumber"
+                ref="phoneNumber"
+                type="text"
+                label={phoneLabel}
+                defaultValue={this.props.defaultPhoneNumber}
+                value={this.state.phoneNumber}
+                prefix={phoneCountry}
+                onBlur={this.onPhoneNumberBlur}
+            />;
         }
 
         const registerButton = (
             <input className="mx_Login_submit" type="submit" value={_t("Register")} />
         );
 
-        const placeholderUsername = _t("Username");
-
         return (
             <div>
                 <h3>
@@ -395,22 +392,36 @@ module.exports = React.createClass({
                 </h3>
                 <form onSubmit={this.onSubmit}>
                     <div className="mx_AuthBody_fieldRow">
-                        <input type="text" ref="username"
+                        <Field
+                            className={this._classForField(FIELD_USERNAME)}
+                            id="mx_RegistrationForm_username"
+                            ref="username"
+                            type="text"
                             autoFocus={true}
-                            placeholder={placeholderUsername} defaultValue={this.props.defaultUsername}
-                            className={this._classForField(FIELD_USERNAME, 'mx_Login_field')}
-                            onBlur={this.onUsernameBlur} />
+                            label={_t("Username")}
+                            defaultValue={this.props.defaultUsername}
+                            onBlur={this.onUsernameBlur}
+                        />
                     </div>
                     <div className="mx_AuthBody_fieldRow">
-                        <input type="password" ref="password"
-                            className={this._classForField(FIELD_PASSWORD, 'mx_Login_field')}
+                        <Field
+                            className={this._classForField(FIELD_PASSWORD)}
+                            id="mx_RegistrationForm_password"
+                            ref="password"
+                            type="password"
+                            label={_t("Password")}
+                            defaultValue={this.props.defaultPassword}
                             onBlur={this.onPasswordBlur}
-                            placeholder={_t("Password")} defaultValue={this.props.defaultPassword} />
-                        <input type="password" ref="passwordConfirm"
-                            placeholder={_t("Confirm")}
-                            className={this._classForField(FIELD_PASSWORD_CONFIRM, 'mx_Login_field')}
+                        />
+                        <Field
+                            className={this._classForField(FIELD_PASSWORD_CONFIRM)}
+                            id="mx_RegistrationForm_passwordConfirm"
+                            ref="passwordConfirm"
+                            type="password"
+                            label={_t("Confirm")}
+                            defaultValue={this.props.defaultPassword}
                             onBlur={this.onPasswordConfirmBlur}
-                            defaultValue={this.props.defaultPassword} />
+                        />
                     </div>
                     <div className="mx_AuthBody_fieldRow">
                         { emailSection }
diff --git a/src/components/views/elements/Field.js b/src/components/views/elements/Field.js
index 1b7d9fdd73a..c6a2113adb0 100644
--- a/src/components/views/elements/Field.js
+++ b/src/components/views/elements/Field.js
@@ -16,6 +16,7 @@ limitations under the License.
 
 import React from 'react';
 import PropTypes from 'prop-types';
+import classNames from 'classnames';
 
 export default class Field extends React.PureComponent {
     static propTypes = {
@@ -30,6 +31,8 @@ export default class Field extends React.PureComponent {
         label: PropTypes.string,
         // The field's placeholder string. Defaults to the label.
         placeholder: PropTypes.string,
+        // Optional component to include inside the field before the input.
+        prefix: PropTypes.node,
         // All other props pass through to the <input>.
     };
 
@@ -46,7 +49,7 @@ export default class Field extends React.PureComponent {
     }
 
     render() {
-        const { element, children, ...inputProps } = this.props;
+        const { element, prefix, children, ...inputProps } = this.props;
 
         const inputElement = element || "input";
 
@@ -57,7 +60,20 @@ export default class Field extends React.PureComponent {
 
         const fieldInput = React.createElement(inputElement, inputProps, children);
 
-        return <div className={`mx_Field mx_Field_${inputElement}`}>
+        let prefixContainer = null;
+        if (prefix) {
+            prefixContainer = <span className="mx_Field_prefix">{prefix}</span>;
+        }
+
+        const classes = classNames("mx_Field", `mx_Field_${inputElement}`, {
+            // If we have a prefix element, leave the label always at the top left and
+            // don't animate it, as it looks a bit clunky and would add complexity to do
+            // properly.
+            mx_Field_labelAlwaysTopLeft: prefix,
+        });
+
+        return <div className={classes}>
+            {prefixContainer}
             {fieldInput}
             <label htmlFor={this.props.id}>{this.props.label}</label>
         </div>;
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index a1448aa6e6a..a17576826cc 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -1258,19 +1258,18 @@
     "The username field must not be blank.": "The username field must not be blank.",
     "The phone number field must not be blank.": "The phone number field must not be blank.",
     "The password field must not be blank.": "The password field must not be blank.",
+    "Email": "Email",
     "Username on %(hs)s": "Username on %(hs)s",
     "Username": "Username",
-    "Mobile phone number": "Mobile phone number",
+    "Phone": "Phone",
     "Not sure of your password? <a>Set a new one</a>": "Not sure of your password? <a>Set a new one</a>",
     "Sign in to your Matrix account": "Sign in to your Matrix account",
     "Sign in to your Matrix account on %(serverName)s": "Sign in to your Matrix account on %(serverName)s",
     "Change": "Change",
     "Sign in with": "Sign in with",
-    "Phone": "Phone",
     "If you don't specify an email address, you won't be able to reset your password. Are you sure?": "If you don't specify an email address, you won't be able to reset your password. Are you sure?",
     "Create your Matrix account": "Create your Matrix account",
     "Create your Matrix account on %(serverName)s": "Create your Matrix account on %(serverName)s",
-    "Email": "Email",
     "Email (optional)": "Email (optional)",
     "Phone (optional)": "Phone (optional)",
     "Confirm": "Confirm",