Most of the bases being closed have a lot of flights to other Flybe bases which could be continued. The main exceptions is Jersey. The following routes would have to W patterns (taken from Flybe route map, it might not be up-to-date):
Jersey - Geneva, LGW, Luton, Bristol, Cardiff, Norwich, Humberside, Doncaster, Durham, NCL, IOM, ABZ, INV
IOM - Liverpool, Luton, LGW, Bristol, Jersey, Geneva
NCL - Newquay, LGW, Jersey, Limoges, CDG
INV - LGW, AMS, Jersey, Geneva
ABZ - CDG, Jersey
Guernsey - LGW, Norwich
It's already been announced that the LGW routes will go and I expect a significant proportion of the others might as well. A hammer blow for all involved