Dakota,
I am very pleased to see your taking notice of all the detail on the various makes and models of UK tractors recently posted on this thread.
To answer your post above with a little bit more detail for you, the rowcrop tractor market in the UK was much different to what you are familiar with in the USA,. Your rowcrop use was mainly corn (maize as we call it) where as here in England our rowcrop work was potatoes, sugar beet and many different vegetables, all these were grown on much narrower rows than your corn of the same period. So most of the rowcrop tractors by all manufacturers at that time in England favoured adjustable wide axle fronts, the other option often seen was single front wheel.
The tractor you pointed out is a very popular in it's time I-H F14, denoted by the rising steering shaft, it's smaller brother the F12 had the steering shaft running parallel with the hood (bonnet). Both models were very popular here with the wide adjustable front axle you see in the photo, the same models was available in single front wheel, the standard fixed axle models were popular here known as the W12 and W14.
All these various Farmall models were well suited to the small English farm of the time, with much smaller fields than you are familiar with.
One of my dad's friend's had an F12 which was a good work horse, but compared to a M-H 12-20 dad always said the F12 known as the "Flee" would not pull the skin off a rice pudding with it's 12HP.
There was not too many F20's found there way to England, more have travelled across from your side of the pond in the more recent "collecting era", the same applies to the earlier Farmall Regular's.
Attached is a photo of the standard agricultural model W14 taken at the same event, a very different tractor to the rowcrop version F14.
Hope a bit of British rowcrop tractor history is of interest to you.
Malcolm.