Yes, I agree. In fact my info against the pictures recognises this - to quote "There is little information available but it seems that a number of Fordson tractors (the name was derived from Henry Ford & Son) were purchased and adapted by fitting large rectangular steel plates front and rear joined by a steel beam to take the buffing forces. Co-incidentally Ford moved tractor production from Cork in Ireland to Dagenham in 1933, and the 27.3 HP model N was produced between 1929 and 1945. It seems other makes of tractor were also converted, and probably all by Muir-Hill Service Equipment (E. Boydell & Co. from 1931)."
That photo is particularly interesting - until I was given this particular photographic collection I'd never heard of shunting tractors (I lead a very sheltered life), and to see them at the factory is a wonderful thing to add to my file on this vehicle.
Oh, would that there was still one available to preserve. But some properly minded soul might decide to convert their Fordson Model N - if they learn about the alternative use.
B