The obvious solution is to complete the training for the LAPL and take the test. Apply for the licence. Once you have it back then do the 15 hours required plus the test for the EASA PPL. I realise this means two tests and two lots of fees to the CAA. The other solution is to do at least the minimum of the 25 hours of dual required for the EASA PPL with an instructor who can teach the EASA PPL.