They are based at Alcester in the English county of Warwickshire, but sell their products worldwide.

In its early days it predominantly manufactured steam locomotives for model and miniature railways.

Today it builds live steam and steam outline electric and diesel hydraulic locomotives for narrow gauge railways in theme parks and similar venues, together with road trains, monorails and various themed custom vehicles, including electric vehicles, buses, and boats.

Vehicles have also been built for many other theme parks and resorts, including Busch Gardens Tampa in Florida, Mirabilandia in Italy, Kuwait Entertainment City in Kuwait, Genting Highlands in Malaysia, and Thorpe Park, Irtra Xetulul/Xocomil Themeparks in Retalhuleu Guatemala and Legoland Windsor in the United Kingdom.

Severn Lamb also built the 52 electrically powered platforms that provided the moving stage that encircled the perimeter of the arena for the opening and closing ceremonies of the 2004 Olympic Games in Athens.