I was responding to yoursAns so they should!
But that caravan and car were not on a motorway hard shoulder (which is basically a continuous, but unused lane alongside lane one.
This car and caravan were in a lay-by, off a dual carriageway, which isnt a hard shoulder but a designated pull of area.
I have a theory why this sort of thing happens (especially on motorways at night) Drivers go into a semi sleep state, their brain "sees" a vehicle ahead on the road thats NOT "on the road" and they "tuck into" the same lane to follow it .
The Hard Shoulder not the photo😉