The Great Western Railway (GWR) 1500 Class is a class of 0-6-0 pannier tank steam locomotive. Despite being a GWR Hawksworth design, all ten (numbers 1500–1509) were completed under the administration of the Western Region of British Railways in 1949, just after Nationalisation.

Coming from a railway company with a well-developed standardisation policy, the 15xx was a strange design finale. Unlike almost all their forebears, they had outside cylinders, Walschaerts valve gear, and a very short wheelbase of 12 ft 10 in (3.91 m) to go round curves of 3.5 chains (231 ft; 70 m).

Although a sound design, the class had limited usefulness as they were route-restricted by their high weight and were unsuitable for fast running because of their short wheelbase. Largely confined to empty stock workings at London Paddington station, their lives were short.

The onset of dieselisation and the decline in traffic on the railway network consigned the 1500s to scrap long before they were life expired. However, the sole survivor, 1501 has enjoyed regular use at the Severn Valley Railway in preservation for far longer than its life in BR ownership.