Alright I'll say it again. Do not pay up front for flight training, even if it looks like a good deal. Or perhaps especially if it looks like a good deal. I don't know Border Air, they may be the most financially secure flight school in the UK for all I know. But don't pay up front - this and other forums are littered with horror stories from people who did that and lost their money.
Indeed. Even the biggest and seemingly most secure schools of all, ie Cabair, can go under and take a lot of people's money with them.
Don't ever pay up front. Book a lesson, after it's flown settle up at the desk on the way out and book the next lesson. Best and safest way to go with your money.