I'm taking the core question of this thread as being whether we think that current legislation on electric bikes in the UK is too restrictive.
I've been tinkering with electric bikes for ten years now, seeking out clean, quiet and practical transportation as cheaply as possible.
It's been a long quest, and I've spent (wasted) a lot of money on bikes that were not practical for the same two basic reasons.
- the battery technology, and the very restrictive UK legislation.
The battery technology has now improved dramatically. Lithium has a much more practical power to weight ratio and longevity of cell life.
My first bikes had heavy steel frames and SLA batteries. Fully road legal. They had a max speed of 12-15 mph, an effective range of about 10 miles, and were then too heavy to pedal comfortably when the batteries went flat.
I then tried a fully road legal 48v electric scooter with a 750watt motor and four 55amp 12v SLA batteries that took the total weight up to about 150 kilograms. The road tax was free (saving £15 then), but the annual MOT was £30, and the cheapest TPFT insurance was £85. The range was about 25 miles, and it had a top speed of 30mph.
I didn't keep it very long because the range was insufficient and it weighed more than my 125cc motorcycle, (and had almost the same standing costs).
I now have two electric bikes.
A fully road legal 250w 36v built from a kit on a very lightweight German full suspension bike, with two 10ah lithium batteries weighing 3.5kg each. It has a maximum speed of 15 mph, and can be easily pedalled with the 7 speed sachs hub gear. The whole bike weighs just on 30kgs with batteries, has no standing fees and has an easy range of 50 miles.
My other electric bike is my newly built 1000w 48v rear motor fitted to a very upmarket "Giant" lightweight bike with 6" suspension travel and hydraulic disc brakes. Running that on the same 36v batteries, it has a top speed of 25mph and a range of about 15 miles. The handling characteristics and braking are superb, and in no way is it
practically overpowered. It is far safer and more practical than my previous road legal 30mph electric scooter, but would be very difficult and expensive to register (V5c, single vehicle approval test, etc.).
I also have a "compromise" powered bike. A Bernardi Buzz 35cc engine on a Dawes frame. Fully road legal, V5c, number plates, tax (£16) insurance (£95) and mot (£30). I think that maybe shows that if higher powered electric bikes were made legal, the legal running costs would be comparable to a moped.
It's a complicated issue.
On the one hand, the 15mph max speed and 250w max power limit on hill climbing makes "free" road legal electric bikes very unattractive to serious commuters.
But on the other hand, the multitude of youtube clips showing 1000w bikes ridden by morons doing 30mph along pavements and footpaths, weaving between pedestrians is not doing us any favours either.