IMMINGHAM, United Kingdom (AFP) -- Brexit has brought hope to the windswept docks of the Humber River, a key goods gateway in northeast England where tens of millions of pounds are being invested to prepare for a potential increase in shipping.

In Immingham, a gritty town of around 11,000 inhabitants in the shadow of the sprawling port and oil refineries, former dock worker Willie Weir said business was already "picking up".

Unifeeder -- a shortsea carrier that imports most of its Britain-bound cargo through Immingham -- said it is seeing more container customers switching from southern ports.

"The cargo naturally finds the easiest course," said the company's UK manager, Andrew Ellis. "It's just economics."

Amar Ramudhin, a logistics expert at Hull University Business School, believes leaving the EU creates "big potential" for a shift to the north.

"Brexit just gave a bigger chance for these ports," he said.

Peter Baker, an industry analyst, said Humber ports offered better value, as they are closer to a raft of distribution centres for firms like Amazon and Ikea.

With more of the journey done at sea, costs, congestion and CO2 emissions all fall, he said.

But Baker said he doubted the Humber ports will be less adversely impacted by Brexit.

"If there are customs checks and port health (checks) and everything else, it's going to be just as difficult in Immingham as it would be in Dover," he said.

Andrew Byrne, managing director of DFDS Seaways -- Immingham's biggest shipping line with its own terminal and 35 sailings a week on eight vessels -- also called talk of a Dover exodus "misguided".

He said his company had also seen "no evidence" of a big shift to containers among its customers.

"We're hoping for the best but preparing for the worst," Byrne said of its Brexit preparations.

Brexit sympathies run high in North East Lincolnshire, the region where Immingham is located.

In the 2016 referendum, 70 percent voted to leave the EU -- one of the highest results in the country and much higher than the overall national result of 52 percent.

Martin Vickers, a pro-Brexit MP from the ruling Conservatives representing Immingham, wants the government to spur regeneration by giving the region freeport status.

He predicted the area would "without doubt" reap a Brexit dividend.

But across the Humber, staunchly pro-EU Hull MP Karl Turner, who represents the most pro-Brexit constituency the opposition Labour party holds, is sceptical about Brexit benefits.

He predicts Britain leaving the EU next March without any kind of deal would be "an unmitigated disaster for the ports."

"There's a bigger risk to the wider economy which I think ABP have not really taken on board," he said.

Back at Immingham's waterfront control tower, where the Humber's 40,000 annual shipping movements are directed from, Williams defends his company's positive outlook.

"We can adapt our space to accommodate whatever the arrangements are and that's why we're confident about the future."