I was about to purchase a speed pedelec so checked the insurance situation. I tried a number of insurance companies but they all refused. I asked a number of bike shops who sell them if they know of customers successfully finding insurance. Only one shop had had any success. They told me the only company insuring speed pedelecs is Bikesure. I had already tried and failed with Bikesure so called them back. They told me the mileage and usage was the issue. I wanted a speed pedelec for commuting and estimated 10k miles per year. So I asked what mileage they would insure - they said more like 3k but not commuting.
So if you want a speed pedelec for low mileage recreational riding and not commuting, you might be in luck.
It's ridiculous that these bike are capable of replacing car journeys, which we urgently need to do to save the planet, but insurance companies are blocking it. I'd wager that the police stop turning a blind eye to derestricted e-bikes before the insurance companies start insuring s-pedelecs properly.