Just got home from collecting this, a circa 1980 yellowbird cultivator /tiller.
A quick Internet search has revealed not a lot, other than yellowbird being an American machine, so I assume Ashley Cooper were importers?.
As you can see, the engine has been cannabalised and is probably beyond saving, I'm think it is a B & S, but if anyone can give me any more information, I'd be very grateful!.
The little three leg cultivator looks like an interesting gadget as it seems to pivot from side to side.
More pics.