Passengers in Lancashire are being advised to check before they travel on the West Coast main line this month.
There will be no direct services between London Euston and Watford over the weekend of February 14 and 15 and February 21 and 22 while Network Rail installs the latest upgrades in the Watford area.
On Monday February 16 and Monday February 23 only two of the four lines through the area will be open until 4pm which means there will be an amended service in operation affecting Virgin Trains and London Midland services.
The closure and reduced service levels are necessary to allow Network Rail to install overhead power equipment and new points on the West Coast main line at Watford.
To minimise disruption Network Rail, Virgin Trains and London Midland are advising passengers to check before they travel as journeys on the West Coast main line in and out of London and between the West Midlands and north west of England will be longer and may involve a bus replacement service.
Passengers using the West Coast main line north of Preston will see trains diverted or replaced by buses between Lancaster and Preston on Saturday February 14 and 21 from noon and on Sunday February 15 and 22 until 4pm.