If you want to be really thorough you can go to Companys House and request the FTO's accounts. Get a qualified accountant to see whether the FTO is likely to be still in business in 6 months time.
Ask if they are flexible with giving you leave from the course too. Sounds silly I know but at BAE Jerez you have to fill out a "leave authorisation" form which then has to be OK'ed by the Head Of Training. I know of many instances where the request was denied and the student was facing having their contract terminated or at least getting a formal warning if they went off home without it. Sounds mad but there we go!
I cannot imagine this sort of behaviour is in place with most other schools but do check.
Good luck,
VFE.