There were both an RF4 and T61 group at Enstone recently, maybe others too (possibly a couple of syndicate Grobs) .
The airfield lease is on notice, but is being legally challenged as I understand.
If Enstone goes, I'd guess most of the SLMG activity will move to Shenstone, Hinton, Turweston etc.
Quite often SLMG groups at some of the gliding clubs. Bidford may be worth a visit.