147,
Cant recommend the air cadets highly enough. I joined at 16 and got a lot out of it, Flying Scholarship, good friends and plenty of memories to mention a few. If you're after a career in the RAF as well it will stand u in good stead at your interviews. Im now UAS and it helped me greatly. Thanks to Another St Ivian for the link, vid of the RIAB was particularly good.
Regards