I'm curious about the cost increase for container ship transport to US/CAN vs lorry transport to EU. Containers are cheap when there isn't a pandemic, right?
Not all exports/imports can be carried in ships. Think about services or fresh food.
Less-urgent goods was/is transported from Britain to the continent by container. Mostly ships, but also by train.
Probably quite substantial. You still need to move it to port and then from port at destination, instead of driving on lorry...