Thanks PrueM for enhancing the photo. It definitely could be just two letters or more letters that are more close together giving the appearance of 2 letters. Hard to say..
I have searched for pictures of Railman to see if the outfit looks like a railman uniform but I haven't found anything conclusive. Today, I received Thomas's marriage cert dated 1912 and it indicates his occupation as a Railway Goods porter and his address is 66 Middle Wall, Whistable .
Grandarog, that was kind of you to search for Thomas and family on the census.