Never Muppit! Never is wrong. While I accept it may not happen now, a 360 over the t/hold happened to me many times. Mind you it was about 10BC, but that is not the point. It did - but it may not be so now. There were also transits over the extended centre line at Edenbridge.
Just thought I would clear that up. I have also taken a formation of Turbs and Tigers over the t/hold of the active on the way to displays. Still, as I say, it was when Pontius was a pilot!
Maybe even one of the LGW controllers, a lot older than me, will confirm it.