I've only had one transit of Stansted in 14 years: and then it was only after an initial refusal when I went back to them to tell them my 'remain outside CAS' route was blocked by a wall of CBs.
Then to give them due credit I got a clearance
along the runway orientation (not across) a half a mile to the east of the runway.
Have tried for STN transits a few times since, always refused: Don't bother asking any more.
Cusco.
