Welcome Terry to the 'UK branch' of this great website. I have been here with Marion for around six years (I left and rejoined) and I've made some great friends across the pond.
I looked up our 'bible' in reference to the 373rd, but no mention of what they did in the UK, only later under the command of Col Frank F. Bell around Le Havre, Rouen and Brest where they undertook limited rehabilitation of these towns.
In 1942 BOLERO was the plan that set the US Engineer Machine in motion to deal with the arrival of our allies from across the Atlantic. The 373rd would have been in at the start, constructing one of the many supply and transportation depots built across Great Britain and Northern Ireland. Shown on the map as Cardiff, Barry was obviously the exact location.
Please keep us posted on your progress, especially about the memorial.
Colin.