Browsing and found a very large number of locos and units are allocated to the national collection from TOCs and leasing companies after they have finished their useful life. e.g Class 60, 150/2, 159, 139, 66, 92, 142, 2 of DRS’ DBSOs, Caroline, a Mk4 DVT, a 442 Driving car. a full HST set with coaches and an example of numerous wagons and snowploughs.
https://group.sciencemuseum.org.uk/wp-content/uploads/2018/07/RHC-designated-items-2018.pdf
A really interesting read.