One of the most obvious steam locomotive absences from Train Simulator is undoubtedly 71000 Duke of Gloucester, the ultimate BR Standard ever built. She deservers a place in Train Simulator in Pro Range with scenarios on Settle to Carlisle in all 3 of her preservation forms. History in link description and photos are from Google https://en.wikipedia.org/wiki/BR_Standard_Class_8
Well since Duke of Gloucester was made by Iron Horse House, DTG now have the rights to it so they will eventually get round to it, considering the amount of IHH stock they have to go through.