I knew it would be recognised easily, though I hoped the odd angle might throw someone. Yes its Kits Coty House. More impressive is your deductions about the camera site. It was indeed just to the edge of the car park/picnic area. I haven't got a record of the lens in the EXIF, but I think I was using the 500mm with a doubler which with an APS-C sensor is equivalent to 1600mm (say 106x optical). I was experimenting and having problems with (1) the wind and (2) my hips. The exposure was 1/60, what I should have done was push the ISO up and hence use a shorter exposure.
Well done for working out the camera position, and over to you.