Air Berlin pulled all their UK domestics when they quit BHD, so doubt that they would recommence flights.
London links from BHD have pretty much been to three London airports for years, LHR, LGW and STN, with only the recent addition of LTN. With STN now gone, it's back to three airports, so potentially nobody will replace the STN. Easyjet may well bulk capacity on the LTN flights and maybe add an extra STN from BFS commencing Summer timetable, but who knows. After EZY coming to BHD, anything's possible!!
Excellent news regarding Manx2 and having a considerable operation now at BHD.