Worried
All well and good until something goes wrong.
The lady reading at the wheel will notice something has gone wrong, and by the time she reassumes a ready position, it is too late.
This would work, so long as the driver remains available to take control.
Also, if the driver is left to get on with other stuff, they'll end up following a random lorry into the HGV parking area of Sandbach MSA, not notice this then get hit with a parking invoice from CP Plus for parking a car in the HGV area, and being there for over 2 hours.