[RV] Mixed duties on the branch (J50)

#ts14 Scenario Final GB steam Western Lines of Scotland Falmouth Branch LMS Class 3F 'Jinty' BR/LNER Class J50 #rtdp{a103b1d2-52ee-422d-9e87-fb09c7fecff8} #rwid{288896145} #scnr{26318e65-ec80-4c08-984d-9de39d2d0071}