So back to the ANO.
And so we return to two different interpretations of the following:
A Part-FCL licence with single-engine piston aeroplane privileges is not deemed to be rendered valid for a microlight aeroplane unless the holder of the licence has undergone differences training in accordance with Section 2 of Part B of Schedule 7, appropriate for a microlight aeroplane class rating.
...from the ANO.
MJ