Nope. First thing you should do is ask yourself the question "why do I want to fly?"
Flying is not a hobby you pick up and abandon after a brief period without regret. The costs involved are simply too high. Particularly if you go for the Golden Standard, the PPL: 45 flight hours, 25 of which with instructor, seven ground exams, one R/T practical and one skills test, and a JAA Class 2 medical are what's required. Figure 8000 UKP at least.
A PPL is great if you want to fly powered aircraft, with passengers, internationally, or if you want to go commercial. You can add ratings and endorsements to it like multi-engine, instrument, floatplanes, complex, high-performance and such so it's the most versatile of all the licenses you can get as a private pilot. But there are other licenses you can consider, for which the training is far less expensive:
- If you want to remain in the UK, outside of controlled airspace, in good weather, consider an NPPL instead. Less hours requirements, less medical requirements.
- If you only want to fly yourself or with one passenger, consider microlights & its associated licenses.
- If your interest is with battling it out with the elements up there, consider gliders instead. Or deltas or parapente. Great fun but a different license required.
- If your interest is in the aircraft structure & systems, then get an NPPL or PPL as appropriate, then join the PFA and build yourself an aircraft
- If all you want is a cheap and fast way to transport yourself to another place, fly commercially.
The decision you make now as to where to start flying training, and particularly on what sort of plane to train, to what syllabus and with which medical, will greatly influence the type of flying you're going to do in the future, and the costs associated with that hobby. So before you commit serious money think about what you want to achieve.
A trial lesson, by the way, may cost 100 quid or so. That's not what I call "serious money". If you consider it serious money, better not start flying altogether. It'll be too expensive.