Mr Pidock converted the motorcycle to use on his daily journey to work at a engineering company in Peterborough during the time of petrol rationing.
The bike was featured in Motor Cycling magazine in 1942 and 1943
Speed is selected by a lever 3 positions 6v, 12v and 18v and the clutch lever operating a Lucas solenoid switch to bring in the motor. The motor is a Morris lorry starter motor.
Thanks Kim! http://www.ebay.co.uk/itm/douglas-pidcock-1922-electric-motorcycle-18v-3-speed-vintage-/232296558758