YAY ! around 1959, Uncle Cyril ( Our local Milkie in West Bromwich ) allowed me some dual instruction in driving his electric milk float.
It had a curved manual Steering Bar, with a Button on the end ( Warning Horn ) and a motorbike style lever which had to be squeezed to let go the brakes and power the wheels.. This assembly protruded from the front of the cart, which also had a rain awning sticking out from the top to keep him dry whilst walking the cart around the streets in the rain. If you tripped and let go the lever,the machine would stop immediately. . .for me as a nine year old, I had to walk fairly Briskly, so I reckon it did around 4 MPH. . .
Later I saw a few of these things hauling Bread deliveries, and one mobile Greengrocer. There was the guy selling fizzy Pop too. . . I wasn't sharp enough then to ask how long the batteries would allow the carts to travel, I just assume it was enough. All the operators seemed to be very Fit though, unsurprisingly.
In the early sixties these contraptions were replaced with larger EVs, with a driver's cab at the front, and a steering wheel ( Luxury )