was this produced by lloyds of letchester?

It is definitely a Four Seasons scrubcutter made by the Standard Insulator co of Camberley.
The early ones had no jockey pulley clutch to disengage the drive to the cutter, this made starting the machine a bit of a nightmare! difficult to hold the blade off the ground while pulling the starting rope. The later ones did have a clutch which made things safer.
I think they did feature on the old website. I will look to see if I have a leaflet as I did restore mine last Year. probably worth looking in one of the Brian Bell books.

Chris