I have a couple of e-bikes in the US but basically there is very little regulation/law around their nature or use in the US. (They are both 500W Radpower bikes that are chip-limited to 20MPH.)

I am thinking of buying an e-bike for Cardiff. I am somewhat confused because here they seem much more expensive, lower powered, are limited to a peddle-assist mode, and, limited to less than 15MPH. Have I got all this wrong?

Any advice much appreciated.