Long time lurker here.
It seemed to be a rail standard not so long ago that any item of rolling stock had a GB number shown o. The body side, together with an European Vehicle Number (EVN). I note the new class 93 and a few other newish bits of stock do not show it. Is it no longer a requirement?
Picture is of a class 397 carriage from 2021, showing both the GB number and EVN underneath)
It seemed to be a rail standard not so long ago that any item of rolling stock had a GB number shown o. The body side, together with an European Vehicle Number (EVN). I note the new class 93 and a few other newish bits of stock do not show it. Is it no longer a requirement?
Picture is of a class 397 carriage from 2021, showing both the GB number and EVN underneath)