I did the 2nd one, ran it as a 30 minute pacer. Unfortunately I think somebody has been a bit too adventurous setting up Palm Bay and Pegwell Bay only a couple of weeks apart. The run I did at Palm Bay they had about 70 runners but the next week when Pegwell Bay was on it got over 80 but Palm Bay dropped back to 35 which is pretty dispiriting for the Director.
They should have given Palm Bay 3-6 months to bed down before starting Pegwell Bay, they are physically too close to each other. Whitstable has felt virtually no falling off at all now the others are there, we get about 140 every week now.
Cinders, don't worry about speed, a great many folk do it in about 30-40 mins, so as Sharon said, you would be fine. I enjoy the Park Runs because it is my only chance to run at "speed".