Regarding the cost he told me that the average cost of doing a PPL in the UK is between 9 and 10 grand. --- So, is he correct or just full of BS?
You can do the sums for yourself, Take the cost per hour including instructor and multiply by 45, that will be the absolute minimum cost. Now add in the cost of exams, landings, flight tests and the big variable, how many hours will you take? The average is between 55/60 not 45 so you need to budget for 33% over your baseline. Whilst it may be possible to do it for £6-7K (No school can guarantee you do it for a set price) then the average is probably between £9-10K
If a school offers you a discount, its probably because they need your money now to pay for someone else's training; who will pay for yours?