pay AS you fly, not before!
Eome, this thread is actually PROOF that all us greybeards who say NEVER be tempted by "save money pay up front" schemes or deals or promises.....in the School of Aviation, that should be your first lesson.
Running a flying school is almost as good a business proposition as running a yacht. It is a large empty hole into which money is poured by enthusiasts supported by suckers.
Also, paying AS you fly keeps you solvent. You may wish to do some of your training in Florida or Texas, or Scotland, which if the Cranfield flying school has locked up your money, will cause you problems. Hold onto your cash and stay flexible.
Don't say you havn't been warned