Commuters in north London will notice many stations closed as major railway upgrades take place.

The scale of work will mean that the Bakerloo line between Queen’s Park and Harrow & Wealdstone and the London Overground between Euston and Watford Junction will be closed in December.

On the Bakerloo line this will affect 10 stations within Brent and Harrow, while the Overground will affect stations near Watford, Harrow, Brent and South Hampstead.

Upgrades will be carried out between December 17 and December 23 on the 20-mile stretch in north London.

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This will include the installation of 6,000 modern concrete sleepers in place of wooden ones dating back to the 1950s.

Around 1.6km of drainage between Harlesden and Kenton will be upgraded to prevent future flooding.

Other changes include slight station makeovers, cable replacement, power supply upgrades and the demolition of a derelict substation.

Geoff Hobbs, director of public transport service planning for Transport for London, said: “We’re sorry for any disruption that Network Rail’s essential track renewal work will cause to our customers’ journeys and are working closely with them to minimise the impact.

“Closures of this type enable work to be carried out which will make customer journeys more reliable in future and are scheduled to take place, where possible, in school holidays when demand on our network is significantly reduced.”