I operated at this unit in 1973 before it became 'Pennine Radar'. I was detached to Northern Radar, RAF Lindholme and although we were primarily an upper airspace unit ie FL245 and up, we also operated the 'Northern Joint Radar Service Area' (NJRSA) jointly with Border Radar operating in the FIR (Class G airspace) below FL245 primarily to provide a radar service to traffic to/from Newcastle and Teeside avoiding the Vale of York AIAA and joining at/leaving at POL.
It was a civil operated unit but changed to military as 'Pennine Radar' when the civil element moved to LATCC.