Can't vouch for any of the others, but why not check out Bournemouth Commercial Flight Training Centre!
They have a good friendly professional operation, high first time pass rate for IR, don't ask for money up front, only schedule 2 students per instructor, and if thats not enough.........they are based in sunny Bournemouth!
I think the web site is
www.bournemouthcommercialflighttraining.co.uk
