Bike Radar has the dates for this year. They are:
* Round 1: Canary Wharf, 25 May
* Round 2: Durham, 27 May
* Round 3: Portsmouth, 1 June
* Round 4: Exeter, 3 June
* Round 5: Southport, 8 June
* Round 6: Kettering, 10 June
* Round 7: Peterborough, 15 June
* Round 8: Stoke-on-Trent, 17 June
* Round 9: Chester, 21 June
* Round 10: Woking, 24 June
I'd go to the Durham one except that I can't make that evening. I may make it down to the Peterborough one, though.