called a Tactical Control Centre (TCC). It became operational around 1961 and undertook these tasks for the duration of the SAM 1 missile life span before going over to area radar control functions. There were similar sites at RAF North Luffenham (Rutland) and RAF Watton (Norfolk). Northern Radar RAF Lindholme was home to the 'Humber Radar' installation, later called 'Northern Radar' as part of the Linesman/Mediator system. Northern Radar was a JATCRU (Joint Air Traffic Control Radar Unit) located at the RAF Lindholme site but housed discretely on the opposite side of the A614 road to the airfield. Northern Radar was one of a number of JATCRUs around the UK whose civil task were to provide area radar cover for the then three area Air Traffic Control Centres (ATCCs), Scottish (located at Redbrae House, Prestwick), Preston (Barton Hall), and London (at West Drayton). JATCRUs were created to provide this area radar cover as the ATCCs did not have radar facilities and were purely procedural control centres. The JATCRUs were located at RAF units using civil and military staff and radio communications, but military radar. Other JATCRUs in the UK included Southern Radar at Sopley near Bournemouth, Western Radar at Aberporth in Wales, Ulster Radar at Bishops Court in Northern Ireland, Eastern Radar at Watton in East Anglia, Border Radar at Boulmer in the Northeast of England, Highland Radar at Buchan in the North of Scotland and Midland Radar at North Luffenham in Rutland. All of which came under the control of Military Air Traffic Operations (MATO). Northern Radar's role was as an ATCRU providing radar services to civil and military aircraft in the lower, middle and upper airspace within its designated area of operations. The airspace above Flight Level 245 was known as a Mandatory Radar Service Area (MRSA) within which civil and military aircraft were placed under radar control. Beneath the MRSA all aircraft operating outside Controlled Airspace (CAS) were provided with a Radar Advisory Service. The site had a Type 82 Radar installation (known as Orange Yeoman) but it also had remote links to other military radar heads. Latter years In mid 1960s to the early 1970s Lindholme was being used as a weekend gliding airfield by the Humber gliding club a member of the Royal Air Force Gliding and Soaring Association. It was used extensively by the Sheffield Scouting movement as a base for gliding activities to