I was at the Castle in North London on Saturday for a Wide Boyz Crack School Masterclass with Tom Randall and Pete Whittaker.
If you get a chance to go on one of these, I'd really recommend it. Here's a link to the blog with pictures, video and more about the session:
http://kragrags.wordpress.com/2014/06/18/thumbs-up-for-crack-school/