Surprised - when I Search on SeSco for RAF Blakelaw - I find zilch. OK Blakelaw (Kenton Bar) is not in Scotland (it is immediately North of Newcastle-upon-Tyne). However it was the HQ for 13 Group that covered all Scotland http://www.bunker13.co.uk/html/history.html
Researching about Rudolf Hess flight , in books often either RAF Usworth (Sunderland) or RAF Ouston (West of Newcastle-upon-Tyne) , now known as Albermarle Barracks. It is hard to determine if it was Usworth or Ouston calling in fighters on 10/5/1941.
Obviously RAF Blakelaw was receiving radar input from Ottercops Moss (first to detect) and ROC from Durham PO (that would be Silver Street, Durham City) and from Scotland.
It is known that Hess was travelling very fast when he crossed the Northumberland Coast , RAF Acklington was very slow in getting Sgt. Pocock into the air to intercept (Hess was well into Scolland by then) , does make me wonder if RAF systems of the time were fast enough