I can see and would expect that where bmi & BA had a duopoly and it now become a BA monopoly, then yes fares are bound to rise. In the UK this will only effect MAN EDI & ABZ, one world will become a monopoly from Belfast through Aer Lingus.
People often quote GLA but from a business point of view it makes sense to be using a 767 rather than two A320/19's and of course better use of the limited slots in to LHR, how much the alleged price increase on this route is down to increased fuel costs?
I can't imagine that the EU will try to force other competition on to these routes, bmi couldn't make them work as part of STAR and there was nothing wrong with the product
Time to bring this sorry saga to end