I sympathise entirely, and would only like to add this -
If I can keep a jet at 300kts for a no delay approach and it is obvious that he will overtake you doing 235/240kts then I will, as long as it does not mean I will delay you.
If it looks like it might be 'once round' the hold for spacing or even flying all the way to the entry fix before vectoring then I will slow jets right down to 220/230kts when they have made the level by restriction (if i still need them to do that). If that means they go behind you, then they will.
The BA and or other airlines thing is just unfortunate.. believe me, we want you on our frequency for as little time as possible, so we do not practice favouritism. A lot of the time we are too busy to play at being silly buggers anyway.
I think that most of my colleagues in the London TMA would feel the same
