Oh yes....e-scooter, that's the name I was looking for !Urm,its a scooter,not a bike
And our courts have already ruled them as illegal under any UK circumstance, so even registration for road use isn't possible. That legal ruling also applies to those which have token pedals.It would be classed as a motor vehicle, so you'd need registration, a numberplate, tax and a helmet to ride it in the UK. That might not go down so well with the city types
A tiny number of steppers are used legally in the EU as normal bikes, the last one I saw reported on was inI wonder where the law would stand if you motorised one of these...could be useful for people who don't have enough knee movement for a traditional bike, as has been discussed here.