Jerry is right that the red and white version is the postwar title worn from 1952 to 1956.
The others are wartime but there is no certain way to attribute them to particular units. Battle Dress arrived in the Home Guard from August 1940 and by 1941 most units had received at least some sets. The official Home Guard title did not start to arrive until early 1941 and in the intervening period the coloured embroidered titles shown were sold by outfitters and bought by many units to wear at the top of the arms.
No printed evidence of there use has been found - I'd like to know about it if anyone has such evidence - and it is not possible from black and white photos to identify letter colours. So although worn they cannot be associated with particular units.
An example of a pair with the original price ticket is shown.
Jon
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