What about Exeter as their next base? I know BE are already there but there are a number of routes which are not offered by them which has the potential.
TOM operate most of, if not all, the charters which has led to a huge reduction in capacity on some routes. I am sure that a B737 would work on part charter part scheduled basis.
EXT are owned by the same owners as Blackpool where Jet2 already have operations. Jet2 also have a big presence at Exeter with cargo work and have, and still do, operate charters into Exeter from places like Lourdes so they are already familiar with the airport, costs etc
Probably will not be Exeter but I would expect them to at least consider it. Even with Bristol up the road, I am certain that there are a number of routes which would be successful both in Germany, Poland and to sun destinations not served at present.