Bradford was brought to Sodor by Samson, and when he noticed Thomas struggling with his Troublesome Trucks, he offered to be his brake van for the day. Once coupled up, Bradford quickly took charge of the trucks and barked at them to behave. Thomas was very impressed until he found out how much Bradford likes to stick to the rules of the railway, which made his trains very late. Thomas later decided to take a train without Bradford, but ended up running into trouble and colliding with Percy on Gordon's Hill. Bradford eventually went back to the Mainland with Samson.
Bradford is an officious and strict brake van who adheres to every railway rule, no matter how minor the rule might be. Although he means well and does his best to keep the trucks in order, his overzealous attitude makes his trains run very late. Because of this, the engines find him annoying. He is also quite conceited, as he claimed he knew how much the engines "appreciated" him.
Bradford is painted light green with a red stripe across his sides. The number "0919" is painted inside his stripes in gold.
- Bradford's persona and dialogue are based on Battery Sergeant Major Williams from "It Ain't Half Hot Mum".