Correct me if I am wrong but its held 3 times a year. the next two are:
Insomnia 46 (i46) - 24th to 27th August 2012
Insomnia 45 (i45) - 4th to 7th May 2012
the competition is for i46 i.e. august 2012 event.
there free parking at the site (woohoo).
I myself am just one hours drive away, I can go but it will probably be a saturday and a spectator badger for the day so I can drive down and back later on. Main reason for me going would be to meet some of the ukcs people in real life, so I know who I am headshotting *grins*
I assume as a spectator I will still have to pay the £11 fee to get in the ukcs box(s)? drop me a PM if you can hold my hand for the day and ill be there, as it will be my first time and my orientation in-game is better then out of game

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cheers
Rene