dramatically, when Bomber Command Bombing School (BCBS) arrived from RAF Scampton, using up to 18 Lincolns and 8 Varsities. In addition in 1958 there was an Anson C19 (serial VM387), and also the first Hastings arrived – TG503. BCBS reduced in size quite dramatically in 1959 and 1960 and in the latter year there seemed to be only 4 Lincolns left, but this type was being replaced by Hastings. All the Lincolns had gone by 1961, with 8 Hastings, including the forerunner TG503, having replaced them. In the late 1960s and early 1970s, 721 Mobile Radar Bomb Score Signals Unit (721 MRBSSU) was lodged on a dispersal on the eastern side of the airfield. 721's role was to track strike aircraft (mainly from the V-force) during simulated bombing runs at high and low-level and score the accuracy of the simulated attacks against designated targets within a radius of approximately 50 miles of Lindholme. Radar operators on the ground had to pick up and then 'lock on' to the aircraft whose track was then printed onto a chart in the operations caravan. Prior to the simulated weapon release the aircraft would transmit a steady tone on the radio which ceased at the release point. Following the simulated release the aircraft would then transmit a coded message that provided the MRBSSU with the information necessary (wind velocity etc.) to 'score' the attack, the results (in terms of bearing and distance from the designated target) being passed to the aircraft in another coded message. The unit was capable of handling aircraft at 10-minute intervals. By 1968 the Bomber Command Bombing School had become Strike Command Bombing School and in 1972 moved out. Hangars were used for storage by a USAF detachment during the height of the Cold War and later for various RAF ground units and Strike Command stores, where parts for front-line aircraft were stored. Lindholme also had an interesting approach pattern with a visual circuit of 800 feet. This was so that the approach did not interfere with the approach for neighbouring RAF Finningley's runway 20. During the late 1950s a site was built (later to become Northern Radar) to house the Type 82 radar and operational control building that controlled three air defence Bristol Bloodhound SAM 1 missile sites distributed within a 25-mile radius of the site. The site was part of the Fighter Command air defence network and was