It pretty much has to be the west of France.
You're not going to start a UK route for just 3 months, apart from maybe Newquay and that's not going to work in a Ryanair size plane.
So the west of France is the only other short sector available.
Hopefully, Nantes as it's the most likely to work, but if they want to give Dinard or Brest a go, I wouldn't complain.