Thanks, Flecc, for finding the link to that old post for me!
David, I've found two other data points since that post:
1. I looked at the accounts of Ultima Networks, the holding company for PowaCycle, and they pretty imply their electric bike revenue in 2006 was £5-600k. They sell direct and via dealers, so adding a bit of dealer mark-up (and you will have a better idea about what that is than me) you might get to about £750k at RSP, or about 1500 units.
As it happens, my wife bought a Powacycle the other week from The Electric Transport Shop (who also let me have a test drive on a Wisper!). They said the Powacycle Salisbury/Windsor was their best selling model. I would expect their sales will be quite strongly up, given decent product, good reviews and keen pricing, so they could be doing 2-3,000 units this year. This is consistent with a market of the order of 10,000 units, or about £5m - as I suggested in that previous post. It could easily be double that, as per Flecc's estimate, but I don't sense it wculd be more than 20,000/£10m - yet!
2. A very interesting
study from Berkley University posted by Miles Hellon, which gives a Chinese market of 10 million units (!). Says nothing directly about the UK but some very interesting market penetration benchmarks, such as share of total bicycle market, e-bikes per head, etc
Please let us know if you get any data which either confirms or contradicts!
Frank