During the rush hour London commute, Non-folding bicycles are not allowed on the train service. However there has been a rise in people bringing non- or only partially folding electric scooters on my regular commute. Whilst the green credentials I'm sure are admiral, the size of these scooters are a menace. Are these really permitted to be carried on peak services?
Guard's discretion I suspect. As they aren't legal to use in the UK., it's unlikely that SWR will have a policy. Have you tried asking a guard?
My friends gave me an electronic scooter Glion Dolly 215 https://whatever-tech.com/best-electric-folding-scooter-reviews, this is a super thing. I do not know how I used to live without him. But now I am concerned about the rules of driving on electronic scooters. I would like to fully use the scooter and ride it to work. In the near future, a bill will be issued as a result of which the Electric Scooters will receive admission to public roads in the UK. It will be very good.
I'm not sure how "near" that future is due to Brexit and the change of PM. If there is a General Election the whole thing gets shelved anyway.
In practice the Police appear to be turning a blind eye to scooter riders as long as they are being sensible and using cycle lanes etc. Obviously there is still a risk however.