Network Rail is to deploy 14,000 staff over the May Day bank holiday weekend to carry out major improvement projects worth almost £50M.
The work will affect 5% of the network and includes construction of new platforms and station facilities, junctions and equipment installation.
“Passenger numbers continue to grow and grow and this bank holiday investment programme forms a key part of our £38bn railway upgrade plan that is aimed at meeting surging demand and improving and expanding our congested railway network,” said Network Rail chief executive Mark Carne.
Work includes laying new track and junctions at Slough as part of the Crossrail project. There will be work on the Great Eastern main line from Liverpool Street to Ingatestone with a new bridge built at Pudding Mill Lane, near Stratford.
Other work includes replacing a key junction outside Waterloo on 2 and 3 May. This is expected to disrupt many of the services into the station.
On the West Coast Main Line to Scotland there will be work around Wolverhampton, Stafford and Crewe, including the installation of a new signalling system between Birmingham and Wolverhampton. New track and overhead lines are being installed on Saturday and Sunday in and around Stafford.
A road bridge near Newton, Glasgow will be demolished, and a new footbridge will be installed near Motherwell, while new track will be laid and junctions replaced near Carstairs.