This is my Grandad in his younger days with a new rotavator. I’m sure I remember him with a merry tiller, but this looks more like a landmaster; but not sure about the handlebars. Can anyone she’d any light on it?
It looks like a Shay Rotogardener, made by the people who invented the rotary mower called the Rotoscythe. Picture shows Phil Murrell’s collection of Rotogardeners displayed at Ardingly in 2015 with the similar model in the middle. Alternative suggestion would be a Versatiller by Farmfitters.