See below, gleaned from RAF website/RAF Brize Norton website. The phone no. is for Media relations dept, who should be amenable to your reques, through which you can get to 101 Sqn. Or PM me, and I'll give you the phone no. of the engineers' office. Though it might be empty, they always seem to be too busy......
RAF Brize Norton
Carterton
Oxfordshire
OX18 3LX
01993 842551