On a school visit to Vickers at Brooklands being shown the first RAF VC10 being built still 'on the stocks'. FZ poked his head round a hessian screen and there was the TSR2 in all its glory - this was well after the political chop. "You weren't meant to see that!" said the guide rather taken aback.
I believe it may have been taken away to Orford Ness for BDR trials etc. subsequently.