Has to be a "Britbox". Slightly worrying that our 'betters' on the 'shiny fleet' needed labels to show them where they should sit!
Unfortunately the yokes were obscured but presumably they were labelled also? Something like Left-hand Pilot and Right-hand pilot? TCEU would probably have a Cat question about it!
We grubby old ground-hugging Bev people had to work it out for ourselves!