Link to WDIV example page

Fixes #80

democracy_club/apps/projects/templates/projects/polling-stations/home.html

@@ -14,7 +14,7 @@ <h1>Polling station finder</h1>
 
 One of the most common questions from voters on election day is “*where do I vote?*”. We try to get people answers.
 
-  <a href="https://wheredoivote.co.uk/">Our polling station finder</a> can be used by voters searching on the internet or on their local council website.
+  <a href="https://wheredoivote.co.uk/">Our polling station finder</a> can be used by voters searching on the internet or on their local council website. <a href="https://wheredoivote.co.uk/example">See an example result</a> for a postcode.
 
 We work with local government to establish internal best practice for publishing open data on polling stations —
 which means it becomes incredibly easy for voters to find it. Voters don’t need to know which ward or