More than 15 engineering trains took part in an intense session of work at London Bridge station over the bank holiday weekend.
This video shows Network Rail ploughing on with the £1bn rebuild project that is taking place as part of the Thameslink Programme.
There were no trains to or from Charing Cross, Waterloo East, Cannon Street or parts of London Bridge over the three days of the August holiday.
Work included laying more than 1km of track; installing a massive new signal gantry near Waterloo East; completing several new sets of points; and putting in place more than 6km of power cables.
Thameslink Programme rail systems director Mark Somers said: “I’d like to thank passengers and our neighbours for their patience this bank holiday as we have completed more work around London Bridge.
“Every weekend where we can do work on this scale is absolutely massive for us. Every single piece of track and every piece of equipment we put in position this weekend is crucial for Christmas, which will be the vital next stage for the project.”