This locomotive is a Garratt, which is an articulated engine. This is a more unusual design to have on a 7¼ inch gauge railway.
This design sees the locomotive with two power units and a water tank at each end with a central boiler and cab. These power units are basically designed around two Horton chassis.
Currently out of service awaiting a major overhaul, the engine was completely stripped down and when it returns to service will be like a new engine.
William Rufus takes the name from King William II who was was fatally wounded with an arrow during a royal hunting outing in 1100AD at Rufus Stone. Rufus Stone is only 15 miles from Moors Valley in the New Forest.