Antony Johnston (http://en.wikipedia.org/wiki/Antony_Johnston) and Paul "Freak Angels" Duffield will be there from the comics world and Jeff VanderMeer (http://en.wikipedia.org/wiki/Jeff_VanderMeer) should be interesting. Plus it is free to get in:
www.thrillingwonderstories.co.uk
The location isn't that clear but I assume it is here:
http://www.aaschool.ac.uk/AALIFE/BEDFORDSQUARE/bedford.php
It also streams online if you are interested but can't make it.