I dont know your budget but there are places in Florida, USA (many advertise in the back of the pilot mags) that say PPL in 3 weeks - I would give it 4 weeks and that gives you extra time in case of bad weather etc. If you were to head out to Florida to do the PPL then if I were you to read all the books before you flew out and get the exams out of the way.
The bronze gliding (were you in the Air Cadets at all?) will help you - it will give you a head start once you start flying.
BUT remember - get the exams out of the way ASAP I am talking from experience.
Hope this helps.
