Digging through the LocoYard archives I came across which was shared but not really looked into.
The photo shows 6024 ‘King Edward 1’ pretending to be sister engine 6004 ‘King George III’ during the West Somerset Railway on 21st Gala March 1997. It was done after a member of the 6024 society paid for the opportunity to see this lost piece of history. I do like it when locomotives switch numbers for things such as photo charters as it does allow to us recreate pieces of history that wouldn’t normally be possible.
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