FCL.710 Class and type ratings – variants
(a) In order to extend his/her privileges to another variant of aeroplane within one
class or type rating, the pilot shall undertake differences or familiarisation training.
In the case of variants within a type rating, the differences or familiarisation training
shall include the relevant elements defined in the operational suitability data
established in accordance with Part-21.
Looking into CAP804, would that not also apply to an SEP rating? Surely a PA28 is a different variant to a C172?