Well there's already a JetTime(?) B737-7 down to operate some freqs in S16
There's a JetTime 737-700 down to operate some frequencies on Copenhagen, Edinburgh and Glasgow to LHR as well. I hardly think you can cite the appearance of the wet-lease as indicating that the routes or frequencies are under threat. I do question whether BA would have done this if they still had competition on LHR-ABZ/EDI (I suspect they definitely would not have done) but as the competition has gone, it's a moot point.