You can do much better than £6k.
If you want to learn to fly powered, and have very limited money,then you are exactly where I was when I'd just graduated from university.
I'm firmly of the opinion that your answer is the same as mine. The overall cheapest way to learn to fly is to do your NPPL on microlights at a nearby microlight school.
The hourly cost is slightly less, there are only 5 written exams rather than 7, and the minimum hours to get your licence are 25 compared to 32 for NPPL(SSEA) or 45 for PPL(SEP). And yes, these are real aeroplanes, as safe as anything else flying with less than 2 engines. outperforming many common light aeroplanes - and you might actually be able to afford to keep flying after you've got your licence.
It's how I started, and worked extremely well for me. 20 years later I have 4-figure hours, a commercial licence and an instructors rating: but I started on microlights, still fly them for fun, and would recommend the route to most people.
G