Be consistent about CFP closing

content/cfp.html

@@ -5,7 +5,7 @@
 callout_big_2: ...you
 ---
 
-<p>To submit a proposal to run a session at PyCon UK 2016, please complete <a href="https://docs.google.com/forms/d/1IkIuN13wwDl1gH1L00HQ6UaX-3PWd3uFHuHvCmEJYGA/viewform">this form</a>.  Submissions are open until June 28th.</p>
+<p>To submit a proposal to run a session at PyCon UK 2016, please complete <a href="https://docs.google.com/forms/d/1IkIuN13wwDl1gH1L00HQ6UaX-3PWd3uFHuHvCmEJYGA/viewform">this form</a>.  Submissions are open until the end of June 28th (BST).</p>
 
 <p>This is a <strong>community conference</strong>. You’re coming to the event, and that makes <strong>you</strong> part of the community and makes this <strong>your</strong> conference. If you’ve done something that you think other people might be interested in, or that you think they should know about, <em>we would love to know about it</em>.</p>
 
@@ -65,7 +65,7 @@ <h2>How to submit a proposal</h2>
 
 <p>Don’t hesitate to submit more than one proposal.</p>
 
-<p>The deadline for submissions is the end of Wednesday 15th June (UTC).</p>
+<p>The deadline for submissions is the end of Tuesday 28th June (BST).</p>
 
 <h2>Need help?</h2>
 <p>Perhaps you’re not sure what aspect of your proposed subject will be most appropriate or interesting, or how to word it, or what level to pitch it at. Perhaps you’re not sure it’s what we’re looking for.</p>