Interesting film produced by Ferranti's around 1965. .About half of it is in-cockpit film from the trials aircraft as it follows the green dot in the HUD indicating the safe path the radar provided along the low level route. Most flights were at 60m clearance thought some at 30m. At about 11:52 the pilot flies over a cloud covered peak and at 15:32 he is heading towards a 230m TV mast. The system was manual but there could be an output for autopilot.
From a little research it seems that this radar was designed for the TSR2 but that development continued after the TSR2 was cancelled.
You'll note that the main trials aircraft is a Buccaneer (S1 - XK 487) which begs the question why wasn't this TFR fitted to the Buccaneers the RAF later operated?