It does seem odd that the 2nd driver would need to have ADR if by the time it’s his (or her) time to drive there would not be any dangerous goods on board. I thought a class 2 driver would be able to double man with a class 1 driver, class 1 drives waggon and drag Heathrow to Scunthorpe (say) class 2 drives waggon (only) to Hull, Scarborough, York and Leeds then back to pick up trailer when other driver takes over for the journey back. Is there any reason that can’t be done? I understand if the only driver with ADR where to be incapacitated then the other driver may not be able to deal with a spillage for instance but surely this would be the case if it were single manned?