Thanks PRD for pointing this one out.
This machine is about a 1979 Greenfield Javelin. Has this got any numbers above the front axle? If so it is a production model. Design instructions to Mr Kerr were a mower you sit into like a formula one car of the time. Seat is not original but would have been an vinyl padded seat like a race car had. Predecessor to the 5xl. If you think the 5xl was a fail this was even bigger fail. These are rare as rocking horse manure now so lets keep it for prosperity.