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.
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David Cameron said the Met proved it can "do more with less" and declined to criticise the Mayor of London for his water cannon spend.
A group of disabled activists threw toys and balls at him as he entered the conference.
A wet start to the week and the unsettled weather is set to continue over the next few days.