harri1888,
I think its great that your thinking that far ahead already, many people have no idea what theyd like to do once theyve left school.
As far as sponsorship advice is concerned, your guess is as good as mine. Theres very little going on, although it is gradually picking up.
Are you a member of the air training corps? Im sure that wouldnt do you any harm along with a duke of edingburgh's award maybe.
As far as the ppl goes, its always gonna be an advantage to have some flying experience of some kind but dont go and get carried away, some airlines/training schools may not appreciate a massive amount of flying hours, they think you may pickup bad habits that may be hard to get rid of.
Is it just sponsorship your looking for? As this is practically non existant, your best looking into the idea of funding the training yourself at a good training school.
Best of look for the future mate.
Ol