Yes, quite, it is indeed a gas turbine rather than true jet engine, but that hasn't stopped nicanary figuring it out!
It's the Standard Motor Company's experimental turbine engine fitted to a Ferguson tractor. I'm not actually sure whether the unit powers the vehicle or not, and I have carefully filed my source in an unreachable place for the time being. I'll dig it out and confirm later.
Well done nicanary, one more point on its way to you
