Sir Clive is generally accepted to be a slightly eccentric chap, but with a brain the size of a small planet (to borrow a phrase from Douglas Adams).
All that seems to remain of it are this "official" You-tube video, and a web-page that isn't being updated.
I'm old enough to remember the launch of Sir Clive's "other" pedal-electric vehicle, and old enough to have used a ZX81 home computer when they came out (yep, it was 34 years ago).
So, will Sir Clive continue the X-1 project, or will he come out with something else?
If nothing else, perhaps the video will give a few folks some ideas for other bicycle-related projects!