What I would like to see in Train Sim World 4 is the Class 67 Diesel Locomotive with the iconic Belmond British Pullman coaches that go out of London Victoria towards Gillingham Kent to other places the class 67s are known for hauling passenger trains and the mail trains at 125 mph they also can be seen on UKRailtours Mk1 coaches or the MK2e Blue Grey sets with the EWS Business train set it would be useful to have in formation designer too