Holidaymakers planing to travel to Gatwick Airport by rail may need to make alternative travel arrangements if travelling over the next three Sundays.
Engineering works are due to take place on 25 February, 4 March and 11 March.
Network Rail is advising passengers to check before travelling over these three weekends.
The engineering works are part of a £300 million track modernisation programme to replace track and improve infrastructure between Purley and Gatwick.
According to Network Rail, the major work will reduce delays and improve reliability in the long run, on the Brighton Main Line.
On Saturday 24 February, Saturday 3 and Saturday 10 March a half-hourly Gatwick Express service will still operate between London Victoria and Brighton, calling at Gatwick Airport.
However, other services including the Thameslink and Southern lines will be significantly altered. It is advised to check before travelling.
On Sunday 25 February, Sunday 4 and Sunday 11 March, there will be no direct services from London to Gatwick Airport.
A bus replacement service will be in place for all trains between Redhill and Gatwick Airport.
This means passengers will only be able to get as far as six miles north of Gatwick on the train. The replacement bus will call at Gatwick, Horley, Salfords and Earlswood. Journeys are likely to increase by at least half an hour.
Those travelling the other way, from Brighton, will be able to still access Gatwick airport. According to a Thameslink representative, two trains will run every hour.
National Express is also planning extra coach services for holiday-bound travellers during this time.
In relation to the disruption, a Network Rail spokesperson said: “This work is part of major programme to improve performance on the most unreliable parts of the south east network.
“Passengers using the Brighton Main Line in particular have suffered from delays and deserve much better.
“While this work and others planned for the year ahead will cause short term disruption, passengers will experience a better service when our work is complete.
“Please remember to check with your train operator before travelling”, they advised especially to passengers headed to the airport.
In order for passengers to be prepared during this time of disruption, David Bennett, Surface Transport Operations Manager, Gatwick said:“Passengers planning to travel to or from Gatwick Airport by train during any of the next three Sundays should plan their journey carefully and allow extra time.
“Information about other ways of getting to and from the airport – including by car, bus, coach or taxi – is also available on the Gatwick Airport website and our new passenger app.”
Also part of the £300m programme, Network Rail will be carrying out a track upgrade in the Gatwick area over the May bank holiday weekend.
