Now, thanks to seven years of voluntary work and at a cost of about £45,000, the engine has been fully restored. It is the largest engine of its type in existence and the only one in the world that still works.
Peter Meehan, director of Dorothea Restorations, said: “This massive effort by dedicated and high-skilled volunteers is a superb example of the work that the Dorothea Award for Conservation was set up to recognise.
“Without this kind of heroic undertaking, our industrial heritage could quite literally rust away.”
Dorothea Restorations has sponsored the annual Dorothea Conservation Award since 1984. It is adjudicated independently by the Association for Industrial Archaeology.