This was a single tank engine built for light duties on branch lines. Special features were an outer sandwich frame in which the carrying axles were mounted and an inner frame made of metal in which the driving axle was mounted. It left the Brighton Works in 1859 and initially bore no name. In 1873 it was christened “Seaford” and renumbered twice. There are reports of two accidents involving it. It was retired in September 1879 after being used on the Bognor branch.