One way to do it is to get a NPPL first, then convert it once issued to a LAPL. This is an administrative process only, no more flying, just the application fee.
CAP 804 Part II Flight Crew Licensing: Mandatory Requirements, Policy and Guidance
2.1.7 Military experience towards NPPL(A) (SSEA)
2.1.7.1 An applicant for the NPPL(A) with SSEA Class Rating shall be given appropriate accreditation for any theoretical and ying training and ying experience gained during military service. A Medical Of cer in HM Forces who is included in the register of GPs maintained by the GMC may, in certain circumstances, countersign an NPPL Medical Declaration.
FlyingTraining. Any previous ying training on Single Engine Piston (Land) aeroplanes conducted by an FI(A) or current Quali ed Flying Instructor (QFI) may be counted towards the 32 hour minima of ying training and consolidation required before the applicant may take the NST and GST required for the grant of an NPPL(A) with SSEA Class Rating. This may include:
a) Service Flying Scholarship ying.
b) Elementary Flying Training (EFT) ying.
c) University Air Squadron (UAS) ying.
d) Service Pilots under training.
e) Service Pilots withdrawn from ying training.