Does anyone have a copy of/access to the ORB for 1 AACU, Biggin Hill, TNA AIR 29/42, for 1937-39, please?

I have three Sgt Plts of 41 Sqn who transferred to the unit in April 1937 and am seeking information on their arrival and closer identification details.

All I currently have is that Sgt Plts EA Buck, Elliot, & Taylor with no further ID.