Cheapest isn't always best!
Visit them all and have a chat,you are looking for a professional set-up with realistic student performance targets and decent aircraft to obtain your licence,have a trial lesson at two on the short list.
Ask other local pilots where they trained and get as much feedback as possible before making a final choice.
I looked at four before deciding where I wanted to be and am really pleased with the end result.
Remember it might be £20-30 per hour cheaper but if it takes another 15 hours thats a lot of dosh!
Lister
