Battersea Park (my local) is flat as a pancake, guess you can expect a pretty good time - pity about the multiple laps but it is a small park after all.
Have chosen this 10k instead: http://www.runnersworld.co.uk/events/viewevent.asp?sp=&v=2&EN=35841, should be a good day wondering round the TCR show if my legs hold up after the race, must remember to leave my credit cards at home!
Good luck to everyone running this one :)