Could these shunters perhaps be added to GWE and possibly ECW routes as they have found work in these areas before.
There's a family of them starting with a batch of shunters made for the LMS developed into the Class 11 initially for the WD IIRC. The oddest variant must be the Class 13 which I'll leave you to Google because, if I describe it, you'll want to do that anyway.
I am familiar with all TOPS classes of shunter from 01 to 13. The master/slave class 13 was incredible with one cab replaced by weights. All 3 were used at Tinsley Marshalling Yard.
Scenarios such being called from OOC to pick up a faulty train from Padd. Take it to OOC. Did they pull sleepers out of Padd?