Max Angle,
The last 707 to land at Southend was within the last 2-3 years or so, it's crew dumped some drugs on the runway and the aircraft was subsequently impounded and is still there as far as I am aware.
727's in and out reguarly as well, I think I read somewhere, possibly in these hallowed halls, that they can only depart in favourable wind conditions, not sure how true that is, and its too late to start looking for performance figures.
I'm sure someone here knows...