What time of day? At about 1600 ish on Sunday I caught a brief glimpse of a light blue biplane flying low and slow a few miles south of Uckfield, close to the Ringmer gliding strip, which was active launching motorgliders. The engine sounded as though it was throttled back. I could see that it wasn't a Moth (no DH style fin) and initially identified it as a Stampe, but on reflection think it was more probably a Jungmann, given the shape of the fin and the undercarriage, so probably not the a/c in your post. Anyway, hope all was well with the crew.
[ 09 July 2001: Message edited by: FNG ]