battering lumps out of each other
You should see GR's loads from Gatwick... pretty darn good I'd say. BE loads are decent sometimes as well, (but less so). All I'm saying is like JER I'm sure BA could get the upper hand with CI-based Executive Club members - plenty of business pax so yields would be pretty good. They might also inadvertantly take a lump out of Blue Islands' JER-LCY services.
Unfortunately I don't see NQY as a possibility either... it is served very well from LGW and the loads are all right but nothing to write home about when it isn't the height of summer (I used the route in August last year and can see why they continue to operate it, however!).
Angers and Quimper strike me as extraordinary destinations to choose but as you say, it is probably a shot in the direction of Cityjet. However, they might have a tough time this summer trying to make them work and keep the loads up. We'll see.