slim_slag, you do me an injustice - I would have thought my comment about TMAs being "full" was clearly tongue in cheek, in the same manner as FFF's original question
surely was.
Maybe my irony, like my CAA PPL/IR, doesn't travel across the pond
As for BA paying and GA not - two points about that old chestnut which I have discussed in 'ATC Issues' previously.
In the UK - fly an aircraft over 2 tonnes, you pay if you file IFR;
In the UK - fly an aircraft over two tonnes AT NIGHT, you pay. (because night = IFR)
Based on that discussion it's very clear most people don't actually know who pays for what