According to LASORS you have to renew in the aircraft every other year. However, LASORS is not the law and they publish stuff in there that hasn’t been enforced yet.
I believe Linda is the part owner of Professional Air Training (Bournemouth), one of the most well regarded flight schools in the UK so I would guess her comments are based on fact. Maybe it might be worth giving them a call to see what their interpretations of the rules are.