Again, you've missed the point and if you'd bother to go and see you'd know why.
I have thank you.
Mind you I have no idea what the point I have missed is?
It requires zero intelligence and even less time to respond to a request for transit with I am sorry it is not possible today or to assign a squawk if it might be possible.
I have politely asked for a reason if there is one why this is not possible.
I suspect the absence of an explanation is explanation enough.
Not everyone reads PPRuNe you know, it's not in the contract.
Well it should be.
What is in the "contract" is to facilitate a transit if at all possible. The moment the relationship breaks down between GA and CAS controllers things have gone badly wrong. It doesnt happen anywhere else in my experience but Stansted controllers are dangerously close to being as unhelpful as possible - not because of their regular refusals to give transit but because of the way they handle transit requests.