Only the manufacturers or importers are banned fitting a twist and go throttle to new bikes.
Users can fit a throttle if they wish, the police are not interested in pursuing anyone using a throttle on a normal EAPC.
If you want a cast iron certainty, buy one with a Type Approval or apply and pay £55 for an SVA. The SVA does not even mention the word throttle on it!
There is a picture of the Type Approval here:
At last, after a long wait and loads of jumping through hoops we can legally offer full throttle bikes again!
www.pedelecs.co.uk
Again, the word throttle is not mentioned anywhere!
Basically, nobody checks the throttle and there is no specifications to check against the supplied throttle anyway.
The thumb throttle is not a big issue on an e-bike.
Most of my customers hardly notice their presence and rarely use them.
Some have medical issues, in that case, the throttle is a re-assuring backup.