Scotty,
Ghost Fields of Norfolk records that 1611 / 1612 flights were at Bircham Newton in 1942/3.They were using Hawker Henleys for target tug duties. That's all I can find.
I assume you've tried the Action Stations / Action Stations Revisited series?
The City Bookshop in Norwich hold a lot of mini-publications on local airfields in WW2. Perhaps they might have something there after lockdown ends next week?
Apart from the above I'm afraid I can't offer more.