Emailed in by Physiocrat, from the FT:
Ports outside the south-east have benefited from disruption at Dover, helping them to win a greater share of Britain’s growing container and vehicle trade. Northern ports have been selling the benefits of avoiding the congested roads of the south-east and investing in infrastructure just as some hauliers sought alternatives to Dover, hit by the migrant crisis.
The cross-channel route has been declared secure a month after the demolition of the “Jungle” refugee camp and freight traffic is growing again. But government figures for the first half of the year show a drop at Dover as traffic was displaced. Harwich and Felixstowe, the big south-east container ports, also lost traffic to London Gateway, which is expanding fast…
That's only half the story of course. The problem with Dover is not with Dover, but the fact that the traffic there arrives from Calais/France. So this is a golden opportunity for Belgian and Dutch ports as well.