Aeros Flight Training offer ATPL Ground School, CPL, MEP and IR in conjunction with ProPilot ATPL Ground School for £23,128.
I also believe Aeros Flight Training will soon be doing MCC courses at their Coventry base.
Anyway, good luck! Research research research!
From another teenage pilot.
Edit: Aeros are not a Poland FTO. All based in the UK with premises at Cardiff, Gloucester, Wellesbourne, Coventry and Nottingham City.