I'm sure its a codeshare with Virgin with big part of this for feeding flights in to MAN, LHR and LGW Airports for Virgin.
Flybe will use Virgin Slots at LGW so will not be lost. Though I'm sure Flybe will also apply for more when market picks up.
Did say on first administrators report about main Bases in Man and London Airport more this likely to be LGW and few slots at LHR, Also on the first report said about 21 Q400 planes.