Fireman Mike @ NorthAmericanMotoring.com has posted photos of his MINI BMC tractor from the mid-60's and advises:
Designed by the Ferguson tractor group, the intention was for a small, 'MINI', tractor for the small farms of Europe. It was the classic case of bad timing, the market shifted to larger farms, hence larger tractors, just look to the US market at the same time. The Mini was sold over in the US as a utility type, golf course mowing and such, for a couple of years but never took off. BMC sold it under the BMC and Leyland name before dropping the line about 1970.
Mine came from Florida and is currently in restoration mode, meaning in pieces in the garage. I hope to have it done in the next couple of years, parts sourcing being a major issue. The Grey Mini is a proper color, a small number were done in Ferguson grey, the Red is the color sent to the US and is proper for mine.