How many female officers are in the RAC already?

Nope. There was one in the early 90s, doing an SSLC / “O Type”. Commanded Heavy Troop in the RAC Demo Sqn; and won the Tp Ldr’s trophy in the Sprott Cup...
Genuine question, was she badged Scots DG, or was she summat else in a Tp Ldr post?
I know the LD have a female officer too.
A few do - I know of at least another Regt that has a Female Troop Cdr.