The station was shut for three days over the bank holiday weekend, with hundreds of engineers working on the West Coast Main Line to improve passenger journeys.
The work included replacing switches and crossings at Kensal Green, strengthening the railway embankment in Harlesden, and installing new track and railway foundation stone near Tring.
The drainage system was also overhauled to prevent flooding, while the overhead lines at Euston were retensioned.
Old ballast spoil being removed in Kensal Green meant Euston Station was closed over the Easter bank holiday (Image: Network Rail)
The power supply for the London Overground between Watford and Euston was upgraded, and signalling was commissioned for a new rail freight interchange at Northampton.
Euston’s closure also provided an opportunity to completely overhaul the station concourse toilets.
The much-needed work saw upgrades made to the male, female, and accessible toilets, including new cubicles, urinals, soap dispensers, and a deep clean of all areas.
Network Rail also used the time to upgrade signs in the station to make getting around clearer for passengers.
A large advertising board at the main railway station had to be switched off last year following multiple complaints it made the customer experience worse.
Brian Paynter, Network Rail capital delivery head of track, said: “We’ve invested millions of pounds to improve future journeys on the southern end of the West Coast Main Line this Easter, at a time of year when we know passenger numbers are lower so we can minimise disruption to one of the country’s most important rail routes.
“In the short term we know some passengers were disrupted and I’d like to thank them for their patience if their travel plans were affected over the bank holiday.
“In the long term though, our ongoing investments will see smoother and more reliable journeys and better facilities for passengers travelling to and from London Euston.”
Euston station will once again be closed on Sunday, May 4, and Monday, May 5, for further upgrade work.
Passengers are being advised to check before they travel by visiting nationalrail.co.uk so they know exactly what to expect from their journey.