Archaeologists working at an east London Crossrail site have uncovered remains of the historic Ironworks and Shipbuilding Company.
Work is under way at Limmo Peninsula, by Canning Town, to record the remains of the shipyard, which shut in 1912.
The firm employed thousands of people to build ships for navies worldwide.
Crossrail said details of the shipyard were documented before digging began so it had incorporated the excavation work into its construction programme.
It said tunnelling in the area where the shipyard is being excavated would begin later this year.
The shipyard played a significant part in Britain’s industrial history until its closure in 1912.