Network Rail has released a video showing engineers hard at work on the upgrade at Waterloo.

Platforms 1 to 10 at the UK’s busiest station were closed on Saturday (August 5) and work will continue until August 28.

The platforms will be extended and modified to accommodate longer trains.

Fewer trains are running while the work is undertaken, which could make stations on the South West Trains line much busier than normal.

Becky Lumlock, route managing director at Network Rail, said: "We've already made good progress over the weekend in our work to build longer platforms at Waterloo, which will provide the space to run longer trains by the end of this year.

“We've had 1,000 engineers and track-side staff working shifts round the clock since 1am on Saturday, and they'll be continuing to work 24 hours a day to complete the upgrade.

"I'd like to thank the significant number of passengers who have adjusted their journey plans around the work this morning and ask that they continue to do so, while we deliver one of the biggest and most complex upgrades at Waterloo in a century.

“Train services continue to be significantly reduced and passengers should expect disruption to their journeys, with crowding and queuing at stations during peak times, until August 28.”