Aren't they going to be a bit tight on weight for UK roads for container transport?
From what I can find out, the maximum total weight for road transport is 44,000kg. Allowing 7,000kg for the chassis, 4,000kg tare for the container, 20,000kg for the load (although this can frequently be heavier) and 10,500kg for the 500 mile range tractor unit you're already at 41,500kg. The only seismic event may be the ground shaking.
I can see the use for lighter palletised type loads and charging can be done during madatory rest periods (assuming there's enough chargers available in the right places), but for the big container haulage jobs from ports not so much.