Ex –Army personnel were invited to apply for campaign Stars and Medals after WW2. There is an application card for Tom Brain of The Cross, Drybrook. The cards are on Fold 3 (ancestry site) and Forces War Records site. He applied in June 1950. A list of Stars and Medals was pre-printed on the card and the applicant was to strike out all those that they did not qualify for. Tom struck them all out and then wrote in Africa where he had struck out the Africa Star, so it can be assumed he served in North Africa. He also applied for the Defence Medal and War Medal. He only gave his service number as 1907705 and unfortunately did not write his regiment or other branch of service in the relevant box on the form. There does not appear to be any other online record of him relating to his war service.

Edit: Looking for other soldiers with close service numbers to T. Brain 1907705, found a John Augustus Thomas 1907717 Royal Engineers (he was killed in action in North Africa) and 1907718 P. R. Gazzard who was also Royal Engineers (no other information on him). So it looks like Tom Brain's service number was in a block of numbers allocated to the Royal Engineers.