Have you considered learning on motor gliders?
You can get a NPPL for about £3,500 that way (about 55 hours).
Then you can simply do a type conversion to group A if you want to.
Forget doing it in 35 hours - you won't get a NPPL licence in any less time than a PPL licence but you can do it in cheap stuff like motor gliders.
Hinton in the hedges is fairly cheap, if you can get there.