The Garden Room on level 3 of the Barbican Centre at about 3:30pm on day 2 of the Wikimania 2014 hackathon
<a href="//commons.wikimedia.org/wiki/User:Chris_McKenna_(WMUK)" title="User:Chris McKenna (WMUK)">Chris McKenna</a>
<span class="int-own-work" lang="en">Own work</span>