Hi Alex,
In my opinion, don't waste your time or money on a PPL. Go straight for an integrated course at either Oxford or Jerez. By the time you've done your PPL and applied for sponsorship etc you'll be flying around in your PA28
on your way to getting a CPL and then the rest.
Sponsorships sounds great but you'll be working for not such a good airline and earning a reduced salary for the first few years. Work hard, get the correct training (maybe not the best, but best name), be a nice guy/gal and you'll laughing at the end. You will need some luck on the way, but everyone has luck, the lucky ones just take it.
All the best
SS