mazzy1026
I take it from your location the schools close to you are:
Ravenair - Liverpool
Barton - Lancashire Aerodrome
MSF - Manchester Airport
Comed - Blackpool
The cost of each exam does depend on the school you are with example:
Barton will charge around £10-15 pound per exam, where as MSF will charge £20-25 pound per exam
Best thing to do is ring the flying school of your choice and arrange to speak with the CFI (Chief Flying Instructor)
The reason I mentioned the above schools are because there are all very good
Good luck