It's cost more than 1.5 billion pounds, taken 6 years to build - and today it finally opened. London Gateway is a new port on the north bank of the Thames, that will be able to handle the world's largest cargo ships.
When fully operational it will be the country's second largest port - and could bring thousands of jobs to the region. Our Political Ccorrespondent Simon Harris reports.
The first ship to call at the London Gateway on a commercial service put the new port in business today.
DP World, one of the largest port operators invested £1.5bn into creating the 2.7km quay. The cranes stand on an area that has been built using mud and silt reclaimed by dredging a 100km stretch of the North Sea.
London already has two ports on the Thames - Tilbury, upriver, and Thamesport, downriver - but London Gateway differs by being able to handle the biggest ships built.
Felixstowe and Southampton, the UK's biggest container ports both have five berths available for ultra-large ships.
London Gateway opens with one berth, a second will be available from next April with more following in line with demand.
The Mol Caledon from South Africa was the first scheduled ship to arrive at London Gateway.
It came in yesterday at 10pm carrying fruit, drinks and car parts.
The giant quay cranes at London Gateway are the biggest of their kind in the world, lifting containers directly off the ships. We meet the workers with a head for heights: Crane operator Nicki Allabush, engineering director Andrew Bowen and engineer Tony Moore.
These are eight quay cranes which have been installed at the new London Gateway.
Sixteen more cranes will be installed in the next few years.
The 0750 cargo train departing from London Gateway carrying drinks to Daventry. Today is the Official opening of Britain's first port in 20 years.
A vast new deep-sea container port for London officially opens today.
London Gateway in Stanford-le-Hope, Essex, is a £1.5 billion "super port", which is expected to save British importers and exporters hundreds of millions of pounds every year from reduced transportation of goods across the UK.
It is the closest deep sea port to London, Birmingham and Manchester.
London Gateway is Europe's largest logistics park with 9.25 million square feet of warehouse capacity, and it is thought the development will add £3.2 billion to the economy each year and 12,000 direct jobs.
The port will take approximately 2,000 trucks off the roads a day and 148,000 tonnes of carbon dioxide, saving money for freight forwarders and cargo owners by giving them more direct access to consumer markets across the UK.
The Prime Minister was at the new London Gateway port in South Essex, where it was announced that Marks & Spencer will build a new distribution centre, creating 700 jobs.
Hundreds of workers will also be employed in construction of the centre, which is to due to open in 2016.
London Gateway, the UK's newest deep-sea container port, opens later this year.