Brief chat yesterday with the maker of a homebaked e-bike. He'd taken a nondescript frame and stuck a large battery pack, with vinyl cover, between down and top tubes. This drove a large motor in the rear wheel. This develops 7hp and propels the machine to about 40mph, he said (so according to UK law it's an – unregistered – electric motorbike). Pedals and drive chain all present but almost entirely unused, he's got it all on throttle control. Regenerative braking along with the V-brakes and he'd somehow wodged a small amount of telescopic suspension between fork crown and wheel. All finished off with always-on headlight and a tough rear carrier with comfy pad for his girlfriend to sit on.