We already know the 8 BRS routes are being axed
Several of the routes are duplicated with the existing Flybe network
BHX - ABZ, BHX - DUS, BHX - EDI, BHX - GLA, BHX - GVA, BHX - HAJ, BHX - HAM
MAN - BHD, MAN - GLA, MAN - SOU
SOU - EDI
This leaves 30 routes. I doubt Flybe will continue GLA - CDG, FRA or MUC as these operate via BHX and could simply be offered as connecting flights.
Leaving 27 routes., so 5 will be axed to make the 22 planned
My guesses are MAN - BRU (already rumoured), MAN - HAJ, EDI - HAM, BHX - BCN & MAN - VIE