The engineering works come following extensive improvements carried out over the Easter bank holiday weekend earlier this month.
Network Rail’s route director, Ellie Burrows, said: “We’ve carried out a programme of works over the Easter period to maintain safety and improve reliability across the network and will continue with these vital upgrades over the May bank holiday to make improvements for our passengers.
“I’d like to thank passengers for their patience while we carry out these upgrades and ask that anyone travelling over these weekends to check how their journey might be affected.”
Jamie Burles, Greater Anglia managing director, said: “These projects will help to improve punctuality and performance along these vital parts of our network.