u can drivce one on a motorbike licence because its registered as a trike not a car, reliant got away with trike status due to its low weight to the extent that when they added extras the higher up models got plastic windows in place of the lower models glass, they even registered them as trike vans then fitted the windows at the dealers so when registered they were lighter. as for earlier odels havin gno reverse any reliant engined reliant had the reliant gearbox which most definetly had reverse, you may be thing of buble cars which used motorbike technolgy like the issetta etc which had no reverse
cheers Doug