Nexus is James' twin and also comes to help if no spare engines are available.
She was built in 1912, completed just before James. After James went to Sodor in 1923, she was left on the Lancashire and Yorkshire Railway, now the London, Midland, and Scottish Railway. She went to Sodor shortly before her due scrap date, and since she has proved effiecent during James' overhaul, the Fat Controller sold her to the Ribble Steam Railway which also owned a similar Class 27. Since then, she works there and around the Lancashire area.
She is currently painted BR black with lime lining and L&YR in lime with red outlining on her tender.