There was a drafting error in the cross-credit document for NPPL (Microlight) to NPPL (SSEA). If you hold a NPPL (Microlight), you will need to meet the following requirements to add a SSEA Class Rating to your licence:
NPPL(Microlight) or UK PPL (Microlight) to NPPL (SSEA)
The holder of a valid NPPL with Microlight Class Rating or UK PPL (M) licence without restrictions who wishes to obtain a SSEA Class Rating shall:
a. Produce the NPPL or UK PPL (M);
b. Produce logbook evidence of currency on Microlight aircraft;
c Carry out such flying training on single-engine piston aeroplanes as is judged necessary by the authorised instructor giving the training to achieve the required standard to take the NPPL NST and GST in a SSEA. This training must include:
(1) Not less than 1 hour of dual instrument appreciation;
(2) 2 hours stall awareness/spin avoidance training;
(3) Differences training for Microlight pilots whose Microlight flying has been solely on flexwing aircraft;
(4) Not less than the 32 hours required minimum total flight time for the NPPL SSEA Class Rating, which may be a combination of both Microlight and SSEA flying.
d. Pass the JAR-FCL PPL (A) theoretical examination in Aircraft (General) and Principles of Flight;
e. Hold a valid NPPL Medical Declaration or JAR-FCL Class 1 or 2 medical certificate;
f. Pass the NPPL NST and GST in a SSEA.
For the holder of a PPL (M) with operating restrictions, the requirements shall further include:
g. The whole of the navigation training required for the NPPL SSEA Class Rating;
h. The completion of a minimum of 10 hours total solo flying which may be a combination of Microlight and SSEA flying.