The London and North Western Railway (LNWR) 19in Express Goods Class, otherwise known as the Experiment Goods Class was a class of 4-6-0 steam locomotives.

They were essentially a smaller wheeled version of the Whale's Experiment Class and were an early attempt at a mixed traffic engine.

The LMS gave them the power classification 4F.

The LMS renumbered them into the more logical series 8700–8869.

British Railways acquired three 8801/24/34 in 1948, but all were withdrawn by 1950 before they could receive their allocated numbers 48801/24/34.