diff --git a/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/Indirect/IndirectDiffractionReduction.h b/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/Indirect/IndirectDiffractionReduction.h
index a85d80e6f3f3..85ce1560ca60 100644
--- a/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/Indirect/IndirectDiffractionReduction.h
+++ b/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/Indirect/IndirectDiffractionReduction.h
@@ -47,6 +47,7 @@ public slots:
   void loadSettings();
   void saveSettings();
 
+  bool validateParFile();
   bool validateRebin();
   bool validateVanCal();
 
diff --git a/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/Indirect/IndirectDiffractionReduction.ui b/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/Indirect/IndirectDiffractionReduction.ui
index 16bd3b464f97..fbf54a7d743a 100644
--- a/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/Indirect/IndirectDiffractionReduction.ui
+++ b/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/Indirect/IndirectDiffractionReduction.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>495</width>
+    <width>450</width>
     <height>500</height>
    </rect>
   </property>
@@ -290,6 +290,36 @@
          </property>
         </widget>
        </item>
+       <item>
+        <layout class="QHBoxLayout" name="loPARFile">
+         <item>
+          <widget class="QCheckBox" name="ckPARFile">
+           <property name="enabled">
+            <bool>false</bool>
+           </property>
+           <property name="text">
+            <string>Load PAR file:</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="MantidQt::MantidWidgets::MWRunFiles" name="rfPARFile" native="true">
+           <property name="enabled">
+            <bool>false</bool>
+           </property>
+           <property name="label" stdset="0">
+            <string/>
+           </property>
+           <property name="fileExtensions" stdset="0">
+            <stringlist>
+             <string>.par</string>
+             <string>.dat</string>
+            </stringlist>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </item>
       </layout>
      </widget>
     </item>
@@ -443,6 +473,41 @@
    <header>MantidQtMantidWidgets/IndirectInstrumentConfig.h</header>
   </customwidget>
  </customwidgets>
+ <tabstops>
+  <tabstop>iicInstrumentConfiguration</tabstop>
+  <tabstop>dem_ckSumFiles</tabstop>
+  <tabstop>set_leSpecMin</tabstop>
+  <tabstop>set_leSpecMax</tabstop>
+  <tabstop>ckIndividualGrouping</tabstop>
+  <tabstop>ckPARFile</tabstop>
+  <tabstop>cbPlotType</tabstop>
+  <tabstop>ckGSS</tabstop>
+  <tabstop>ckNexus</tabstop>
+  <tabstop>ckAscii</tabstop>
+  <tabstop>pbHelp</tabstop>
+  <tabstop>pbRun</tabstop>
+  <tabstop>pbManageDirs</tabstop>
+  <tabstop>leRebinStart</tabstop>
+  <tabstop>leRebinEnd</tabstop>
+  <tabstop>leRebinWidth</tabstop>
+ </tabstops>
  <resources/>
- <connections/>
+ <connections>
+  <connection>
+   <sender>ckPARFile</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>rfPARFile</receiver>
+   <slot>setEnabled(bool)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>103</x>
+     <y>328</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>276</x>
+     <y>327</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
 </ui>
diff --git a/Code/Mantid/MantidQt/CustomInterfaces/src/Indirect/IndirectDiffractionReduction.cpp b/Code/Mantid/MantidQt/CustomInterfaces/src/Indirect/IndirectDiffractionReduction.cpp
index e299035cf7a8..6d26878b2fae 100644
--- a/Code/Mantid/MantidQt/CustomInterfaces/src/Indirect/IndirectDiffractionReduction.cpp
+++ b/Code/Mantid/MantidQt/CustomInterfaces/src/Indirect/IndirectDiffractionReduction.cpp
@@ -120,7 +120,7 @@ void IndirectDiffractionReduction::demonRun()
   }
   else
   {
-    if(!m_uiForm.dem_rawFiles->isValid() || !validateRebin())
+    if(!m_uiForm.dem_rawFiles->isValid() || !validateRebin() || !validateParFile())
     {
       showInformationBox("Invalid input.\nIncorrect entries marked with red star.");
       return;
@@ -196,6 +196,7 @@ void IndirectDiffractionReduction::runGenericReduction(QString instName, QString
       rebin = rebinStart + "," + rebinWidth + "," + rebinEnd;
 
   bool individualGrouping = m_uiForm.ckIndividualGrouping->isChecked();
+  bool useParFile = m_uiForm.ckPARFile->isChecked();
 
   // Get detector range
   std::vector<long> detRange;
@@ -223,6 +224,9 @@ void IndirectDiffractionReduction::runGenericReduction(QString instName, QString
   msgDiffReduction->setProperty("SaveFormats", saveFormats);
   msgDiffReduction->setProperty("OutputWorkspace", "IndirectDiffraction_Workspaces");
 
+  if(useParFile)
+    msgDiffReduction->setProperty("InstrumentParFile", m_uiForm.rfPARFile->getFirstFilename().toStdString());
+
   m_batchAlgoRunner->addAlgorithm(msgDiffReduction);
 
   m_batchAlgoRunner->executeBatchAsync();
@@ -404,6 +408,12 @@ void IndirectDiffractionReduction::instrumentSelected(const QString & instrument
     m_uiForm.ckIndividualGrouping->setToolTip("");
     m_uiForm.ckIndividualGrouping->setEnabled(true);
   }
+
+  // Update the VESUVIO PAR file option
+  bool isVesuvio = instrumentName == "VESUVIO";
+  if(!isVesuvio)
+    m_uiForm.ckPARFile->setChecked(false);
+  m_uiForm.ckPARFile->setEnabled(isVesuvio);
 }
 
 /**
@@ -452,6 +462,19 @@ void IndirectDiffractionReduction::saveSettings()
   settings.endGroup();
 }
 
+/**
+ * Validates the instrument PAR file option.
+ *
+ * @returns Result of validation
+ */
+bool IndirectDiffractionReduction::validateParFile()
+{
+  bool useParFile = m_uiForm.ckPARFile->isChecked();
+  if(useParFile)
+    return m_uiForm.rfPARFile->isValid();
+  return true;
+}
+
 /**
  * Validates the rebinning fields and updates invalid markers.
  *