Three key London mainline railway stations – including King’s Cross and St Pancras International – will be much busier than usual as spectators travel to the Olympic Park.

Along with Euston, the stations will be key interchanges for visitors, according to Transport for London’s (TfL) Get Ahead of the Games (GAOTG) website which published more data on “hotspot” stations it expects to be affected by the Olympics and Paralympics last week.

St Pancras will have three busy peaks each day – in the morning as spectators arrive, in the late afternoon as spectators arrive and depart and in the late evening after events finish. It will be particularly busy from Friday, August 3, onwards when events begin in the Olympic Stadium.

A number of measures are being brought in to combat busy periods. At times there will be queuing arrangements in place for boarding the Javelin service to the Olympic Park.

Access to St Pancras from the London Underground northern ticket hall will be closed. There will be exit only for Southeastern customers. Access to Tube services will be via the King’s Cross entrance or the western ticket hall through the main concourse.

King’s Cross is expected to be particularly busy from 8 to 10am on Monday, July 30, as spectators from the north and east of London pass through on their way to the equestrian cross country event at Greenwich Park.

Those using King’s Cross Underground are advised to consider travelling through the station after 10am and before 4pm or after 7pm, or to use a different route or alternative station.

The GAOTG website says: “King’s Cross Underground is a very busy station because passengers change between the National Rail and London Underground networks.

“Underground trains arriving at this station will already be carrying large numbers of passengers so it will be difficult to board here.”

Euston mainline is expected to be busiest in the weekday morning peak, while the Underground station is likely to be busiest between 7 to 10.30am on weekdays. Some train companies are putting on extra services during the Games.

Up to three million additional journeys are expected to be made in London on the busiest days of the Games and Tube and train users are being urged to plan for any journeys taking place during the event.

Sebastian Coe, chairman of the London Organising Committee of the Olympic and Paralympic Games (LOCOG), said: “The ‘hotspot’ data published provides employers and individuals with the full picture of when and where our Tube and railway lines and stations will be busy. As the success of the Games depends on all of us doing our bit to keep London and the UK moving, I’d like to urge everyone to plan now, using the Get Ahead Of The Games website.”

Visit www.getaheadofthegames.com