DRS are the main ones, all nuclear traffic is guard operated as far as I know.
DB still have a few I think at Stewarts Lane, primarily for charter work
The rest, when they do have them which isn’t often, usually use travelling shunters
Yes . Most interestingly found a working out for myself on Wednesday 10th November 2021 at 11am at Stafford station. Just before the move to booths masboro rotherham the 365 scrap move.
Colas working from pinnox esso sidings to crewe basford hall s.s.m came in the side off the station where the old royal mail terminal is. With 56302. Shunter rides on locomotive detaches at the front. Locomotive moves around.
Shunter then attached locomotive on the front off train heading back to crewe again.
Iff interested anyone and see how a train attaches to locomotive by a shunter platform 5 at Stafford is the place to be for this example off a travelling shunter.
Interesting working by colas and also good for 56s.
That is the pinnox esso sidings to crewe basford hall s.s.m.