The gist of the above post is correct, but i believe recent sim checks (albeit a year or so ago) were all completed on the Beech 1900D at Farnborough.
It's very possible that as all the sims are brought in-house at Exeter shortly future sim checks will be done at the new facility.
Flybe has a history of recruiting from all backgrounds, but does prefer the Integrated route. There is a stream of guys n gals on various Flybe schemes graduating in the near future and they will take first available spaces.
At present there some new entrants biding their time as CC whilst they wait for their turn, so all in all could be a while for someone not already on the books.
It is a great airline to get started with, and some very interesting flying, but the first few years on the FO scale can be tricky as you can expect to be based away from home.