Wensleydale,
As recounted elsewhere before I managed a visit to Neatishead during a night exercise watching a 2 v 2 (43 sqdn v 56 sqdn I think) where an East coast range was the target.
The controllers where we sat were good, one a German officer on exchange. For their IFF decoding they had a tracker ball but could only read four a minute, based on the revs per minute of the radar head. And yes plenty of chinagraph used.
It was a fantastic visit, albeit some 15-20 years ago now. Although my friend and I were both gobsmacked at how old the kit was compared to what we had been before at LATCC in West Drayton. All very manual, hands on stuff.