Inversnecky
Member
We’ve seen many examples of members of a class being refurbished or reequipped and given a different class number, but I think the 87/2 is the first case I’ve come across of a new putative design being given not its own new class number, but a subset of an existing one:
(Brian Perren, BR Electrification, 1986)
(Brian Perren, BR Electrification, 1986)