Finished building it today (well, apart from throttle, looks a faff taking off the brakes and gear selector) and gave it a test drive after uploading Karl's firmware and dropping max current to 20amps.
My God it's quick. My last ebike was some small wheeled 24v 250w machine, this is in a whole different league. Whole office now wants one!
The surge of power even on lowest 1 setting is amazing and cranked up to level 3, even at 20a is epic. Had huge smile on my face, i dont think there's a hill in Derbyshire this won't blast up.
Installing was surprisingly easy, i didn't know what a bottom bracket or crank was until the other day. My soldering skills are crap so might give it a sort out one day, and need to tidy up cabling, there's about 5 miles of cable included.
Really glad i spent weeks researching and didn't just go for some 1500w hub motor that wouldn't be anywhere near as good as the bbs02.
The Boardman hybrid made a pretty damn good donor bike, everything just fit nicely, and still stops dead.