Easily Godspeed You! Black Emperor at Minehead Butlins. Truely amazing. Very close behind them was Monotonix at Plug - if you have never seen this band live you are seriously missing out.
Special mention goes to Ramming Speed at the Earl, lots of fun!
The memory is vague...Damnation is definately up there, HoF at rock city, Eyehategod at Manchester, I enjoyed Mark Lanegan at the Rescue Rooms but I didn't know much material at the gig, it was more a case of buying the live CD from the previous Leeds gig he played and loving that. Taint at the Social. ...Art of Burning Water were good in Nottingham (not that anyone else would know).
Then courtesy of last fm:
Grifter at the Cremorne.
Karma to Burn at Corp.
Minus the Bear @ Sheff Academy
Monotonix @ the Plug - insane live show!