Brighton 10km is short. It hasn't been officially measured for 7 years even though they've made changes to the course. Their permit ran out in 2004 and is yet to be renewed.
We train on the course all the time and find it very hard to believe its the full 10km. The times run by people in my club are always about 30 / 45 seconds quicker than they expect.
Dave Taylor jogged round it a couple of years ago in 30.06 and finished saying he thought it was short.
Eastleigh is a blinder. Chichester was good this year.