4S-018-016D LSWR Class B4 0-4-0T Black Corrall Queen 30096 - Steam Tank Locomotive - DCC FittedThe London and South Western Railway B4 class was a class of 0 4 0 tank engines originally designed for station piloting and dock shunting. They were later used extensively in Southampton Docks for nearly half a century. The locomotives were designed by the London and South Western Railway (LSWR) Locomotive Superintendent William Adams. They were unusual in having inside Stephenson valve gear but outside cylinders and coal bunkers on the footplate