Interesting.
Have you thought about what sort of work you'll be doing in order to pay for the flight training? It's not cheap in case you haven't noticed.
Going modular will take a few years if money is in short supply. (I am assuming it will be - ie no money from the Bank of Mum and Dad)
You realise that the IR needs renewing as well? So I am curious as to your plan to go to uni post flight training. As you know, uni isn't cheap either.
At the moment and possibly for the next couple of years, a full time course seems to be the "only way in" to the 2 airlines that have been recruiting low houred pilots. (Namely Ryanair and easyJet) This may change, but no one knows when. Bizjets rarely take low houred pilots unless you know someone and have another skill to bring to the party.
For the time being, focus on getting good A levels and saving as much cash as possible. By the time you are ready to begin flight training, the market may have changed.