To test this, I added it to my childhood village here: 
<a href="http://en.wikipedia.org/w/index.php?title=Penn%2C_West_Midlands&amp;diff=492863117&amp;oldid=492144444">http://en.wikipedia.org/w/index.php?title=Penn%2C_West_Midlands&amp;diff=492863117&amp;oldid=492144444</a> <div>

<br></div><div>It works brilliantly. Thanks very much for setting this up Andy - do OpenDomesday know we&#39;re doing it?</div><div><br clear="all"><span>Richard Symonds</span><div>Wikimedia UK</div><div>0207 065 0992</div>

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<span>Visit </span><a href="http://www.wikimedia.org.uk/" target="_blank">http://www.wikimedia.org.uk/</a><span> and @wikimediauk</span></font>
</div><br>
<br><br><div class="gmail_quote">On 16 May 2012 14:16, Andy Mabbett <span dir="ltr">&lt;<a href="mailto:andy@pigsonthewing.org.uk" target="_blank">andy@pigsonthewing.org.uk</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

If you &quot;curate&quot; an en.Wikipedia page about place in the UK, and it<br>
appeared in the Domesday Book, please add the OpenDomesday template:<br>
<br>
    <a href="http://en.wikipedia.org/wiki/Template:OpenDomesday" target="_blank">http://en.wikipedia.org/wiki/Template:OpenDomesday</a><br>
<br>
 to the external links section.<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
Andy Mabbett<br>
@pigsonthewing<br>
<a href="http://pigsonthewing.org.uk" target="_blank">http://pigsonthewing.org.uk</a><br>
<br>
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</font></span></blockquote></div><br></div>