Not the best idea buying e-bikes second hand as battery service life can be an unknown quantity.
Not sure where you'd get one in the UK but one of these would be spot on...http://www.kalkhoff-bikes.com/int/en/mo ... 8-g-1.html
Avoid front-wheel motor and rear-mounted battery packs like the plague if your old man is going to have to lift it.
Completed: 94 Stumpjumper w. M733; ; 92 Dave Yates 731 ; 97 Parkpre Pro-Elite ; Pace RC200 F6 ; Pace RC300; 82 Gios Super Record ; 97-8 De Rosa Giro D´Italia; ; Banani SPX Track bike ; 89 Alan/Mavic Cross Bike ; 05 Focus Cross Team ; 90 Look MI-80 all-Mavic ; 12 Focus Izalco Team/custom build ; 11 Focus Thunder Custom build
Projects : , Brouwer all-Mavic
Stripped : Pace RC303
Gone : GT Karakoram
Stayed in the family: Kuota Kharma, 04 Stumpjumper FSR
Ceased to be : Dynatech MT3, killed by corroded seatstays.