Hello Steve,
It is possible your push hoe was manufactured by Burlinghams of Evesham, Worcestershire.
I have seen these occasionally over the years on ebay usually as hoes but sometimes in cultivator format with a Burlingham plate attached. This is not a foregone conclusion that they were the manufacturer as they were also dealers/agents for a wide range of equipment. They produced alternative implements for the garden tractors they sold and we have three different cultivators they fabricated to fit the Trusty pedestrian tractor.
Regards–Steve