Have you tried Cranfield Flight Training ?.. just a few miles north of Luton at Cranfield Airport
I've always found them most helpful...
Tel: 01234 752272 - ask for David Coulson or Donald Putnam
or have a look at their website first - -
Learn to Fly with Cranfield Flying School -
and no, I dont work for them or have any connection other than a happy former student...
Enjoy...