GtE, that is NOT correct for SEP/TMG. FCL.710(b) refers:
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.
(b) If the variant has not been flown within a period of 2 years following the differences
training, further differences training or a proficiency check in that variant shall be
required to maintain the privileges, except for types or variants within the single-engine
piston and TMG class ratings.
(c) The differences training shall be entered in the pilot’s logbook or equivalent record
and signed by the instructor as appropriate.
My bold.