In West Kent, the results are posted on the 1st March and available on-line from 9am on the 1st March. It's the first year they've gone on-line and the school was unable to recommend it for this reason. However, I now wished I had! Seems easier than waiting for the post, which arrives at 11am!
If anyone lives in a different part of Kent, then go on-line to your local education council, or better still, give them a call. Your school will also know. However, I think most parents have this info inprinted on their brains at the moment, so it won't be difficult to find out!