This has been a previous Pprune subject - it is actually illegal under English Employment Law (cant quote exactly which statute as we speak) to charge for an interview/consideration for any job...
Some years ago, about 16 I think, I applied for the then CSE Oxford/British Midland Sponsorship and was charged £25 for the priviledge...after being turned down I found out about the above statute and threatened them accordingly...and got my money back...