airpasty - First choice which is a part of Thompson's now is based at Exeter and have been for the last 3 years. They only have the one a/c based there.
Have also heard via the rumour mill that First choice is to close there base down at Exeter and to operate through there from other bases on a W pattern.
Otherwise the only other operator based at Exeter is Flybe.
hope this helps.
brgds
W.G