A possible Brexit plus, according to the guy from the British Ports Association I was listening to the other day.
As a result of leaving the single market the BPA anticipate a decrease in RoRo traffic through the major pinch points (Dover, Harwich/Felixstowe and (Tyne?))and an increase in short sea container crossings making use of smaller ports, particularly along the east coast.
Coastal areas in the UK are some of it most deprived areas, and those around the older smaller ports even more so. Spreading the load will help regenerate coastal areas. I think the figure they used were £1 generated by the port = £7 generated in the local economy.
Obviously a long term thing that’s the product of short term pain, but they were certainly seeing this as an opportunity.