I went recently but didn’t realy look for scooters,only British scooters I can think of are Triumph Tina/Triumph Tigress/BSA Sunbeam/DMW Deemster/ and the best British one built in my opinion the Velocette Viceroy
The BSA Sunbeam 250 and Triumph Tigeress 250cc scooters had a twin cylinder electric start air cooled motor, a few specials have been made using this engine, it can be shoehorned into Bantam and Tiger Cub frames.
Also option of 175cc 2 stroke motors on the BSA/Triumphs.Good point regarding the engine fitting into a Bantam frame,missed opportunity for BSA maybe.It wasn’t one of their own engines though was it??
The 175 was a development of the Bantam engine anyway. I think the 250 twin was an Edward Turner design, in-house Triumph. Foot change via a rocker pedal through the footboards if I remember rightly. Looked great and went well but wasn't very reliable.
2009 Burgman 400 in sunny Perranporth
Always seek the happy medium - she's out there, riding her scooter.