Sadly this is yet another example of TBI trying to blame somebody else for their inability to pick up significant levels of new business at Luton ... yet despite everything, the management's attitude seems to be one of "we know best".
In the final analysis, TBI is run by beancounters who are only concerned about the price of all the services it outsources (not just Air Traffic) rather than the quality.
The only justifiable complaint that TBI can have is the BAA shareholding in NATS, which does give rise to an interesting conflict of interests .. but then it's only a 4% shareholding.
Mind you, the new comms system in the tower makes all the controllers sound as if they have got their heads in a cardboard box!!!