Ashley Pickering
Felixstowe opened its £300m South Quay expansion about 15 years ago
A major container shipping company has announced it will no longer use the Port of Felixstowe from next year.
Maersk said its use of the Suffolk port would cease from February following the "Gemini Co-operation" review of its network.
The firm said it had concluded that the London Gateway on the Thames estuary in Essex was "the most optimal port to serve our customers" in the UK.
It said it expected to share further details "over the next couple of weeks".
Mike Page Aerial Photography
Felixstowe has billed itself as Britain's busiest container port
statement on its website, Maersk said: "This change will affect the Asia-Europe trades under the scope of the Gemini Co-operation [a review of its network routes carried out with the Hapag-Lloyd shipping company].
"During this optimisation process and our review of the Asia–Europe services, we have concluded that London Gateway is the most optimal port to serve our customers importing/exporting cargo to/from the UK.
"Due to this change, Felixstowe will not be a part of Maersk and Hapag-Lloyd’s shared Gemini network.
"The previously announced Middle East-Europe (London Gateway) and Trans-Atlantic (Southampton) Gemini services remain unchanged.
"The rest of our own operated services outside the scope of the Gemini Co-operation also remain unchanged."
It added: "There are no changes for Maersk’s own operated services to/from Felixstowe outside the scope of the Gemini Cooperation."
The news comes a month after it was announced £2bn is to be pumped into expanding London Gateway and London Stansted Airport.
Nick Ansell/PA Images
The Thames Gateway container port - at Coryton just west of Canvey Island - opened in 2013
Jenny Riddell-Carpenter, Labour MP for Suffolk Coastal, said: "We need to be cautious in our reaction [to this news].
"It's clear that it's disappointing for us, the Port of Felixstowe and the wider community that they [Maersk] have made that decision.
"We haven't heard anything from the Port of Felixstowe about this. It is one of the busiest ports in the UK; it has a huge offering both nationally and globally.
"I'll be doing everything I can to make sure it continues to be a global player."
In a statement, the Suffolk Chamber of Commerce said: "Whatever the full commercial rationale for Maersk’s relocation to Thames Gateway, it makes it even more important that the rail and road infrastructure in and out of the Port of Felixstowe is the very best it can be to retain and attract businesses, as competition from other ports looks set only to intensify."