Afraid you will just have to accept that your first 100 hours p1 required to meet requirements for a CPL course / instructors rating or to fly a jump plane you will have to fund yourself.
British Parachute association minimum requirements for a jump pilot are a 100 hours p1 with 5 hours on type and then a check out with a BPA examiner; the Cessna 206 is the normal workhorse of the parachute clubs that you could fly with the minimum hours. However most clubs will still charge you for the 5 hours on type, which could still cost you a £1000. Although not compulsory one or two clubs also have a preference for an IMC rating.
So aside from hour building overseas the other way to get these hours would be to get a share in a PFA/LAA type aircraft, which can flown for as little as 30 pounds an hour.
As said with gliding experience and a ppl with a tailwheel rating you may be able to get a tug job but these are quite rare; you will often need to have past association with your local gliding club to be considered.