INFORMATION:

RAF Tholthorpe to the east of the A1(M), exit junction 46 Boroughbridge and work your way east, you may cross a Toll bridge which charges £0.40p, worth every penny. Sorry the best I can do, but if I can find it so should you. That's the fun of it.
OS Ref: SE480656
You can use the Ordnance Survey 'Get a Map' and follow the instructions. Copy and paste the map reference.
The above grid ref. will show you where I started.