The Airfield Research Group has some site reports by Paul Francis to download:
http://www.airfieldresearchgroup.org.uk/?page_id=236
The reports on RAF Northolt and RAF Oakington have much information from Station ORBs.
Northolt: 302, 303, 306, 308, 315 and 316 squadron
Oakington: 3PRU, 7, 101, 15 and 571 squadrons
Regards,
Peter