Hi,
If you don't mind the extra travelling i would strongly recommend Clacton Aero Club, Short Grass strip only 600 metres and then the chance to go and show off the Super Cub's performance in many of the local farmstrips which average about 300 metres, I have done it myself and found it extremely good fun and a great experience, and you get the time in the air that you actually pay for rather than wasting it on the ground. They vcharge around 90 pound an hour dual.