By now you will know that Stan Lee is coming over and also that a Certified Authorized Witness CAW for CGC from Desert Wind Comics will be there. This is the 1st time that they will have been in the UK do a signature series.
Here are some links to take a look at
CGC Signature Series – Whats it all about
How to prepare your comics – VIP as makes it much easier
Desert Winds FAQ VIP very good read on what to expect