The livery is Fastline freight, a subsidiary of the now defunct Jarvis who used these locomotives to run Coal trains predominantly in the north of England.
The locomotive is now owned by DRS, who have taken on the class 66/3's from the administrators of Jarvis.
The train is 4M49 Thamesport to Lawley Street intermodal- a Freightliner service!
Due to a shortage in their own fleet Freightliner are currently leasing a locomotive from DRS- this is despite storing examples of their own class 66 fleet, some of which have passed to rival GBRf!
What an unusual set of events!