On 12th August 1960 Valiant XD864 was due to fly a Profile which 'included four simulated bombing attacks against UK Radar Bomb Score Units'
According to the ATC Flight Plan the grid references were:
55 52N 04 15W (which I make Glasgow)
54 58N 01 38W (about Gateshead)
53 26N 02 58W (Liverpool)
52 25N 00 45E (Thetford)
I was told that the Glasgow target was the corner of a building.