Contingency tickets to Olympic events including the marathon, track cycling and tennis, as well as to the opening and closing ceremonies, will go on sale from this week.

The London Organising Committee of the Olympic Games and Paralympic Games (LOCOG) today confirmed the details for the sale of contingency tickets for the Olympic Games.

Also available will be tickets to the Olympic Park and to the Orbit.

Tickets will be sold on a first come, first served basis exclusively to the roughly one million people who applied in previous rounds of Olympic ticket sales and were not successful in securing a ticket.

Those eligible to buy tickets are being contacted by LOCOG today via email.

Priority will be given to those 20,000 people who were unsuccessful in the initial Olympic ballot application, and then unsuccessful again in the second round.

They will be given 31 hours exclusive access to tickets.

The 1million people who applied in the initial ballot but were unsuccessful will then have an exclusive five day sales period.

LOCOG chairman Sebastian Coe said: “We know thousands of sports fans were disappointed when they missed out in the initial sales period because of the massive demand for tickets.

“We promised we would prioritise these fans when we released the contingency tickets, which is exactly what we are doing.”

All customers will be limited to applying for one session and a maximum of four tickets. Any tickets unsold during this period will go back on general sale from May 23 at 11am.

Tickets to the Olympic Park will allow people to experience the atmosphere of the Park and watch sport on the big screens primarily in the first week before the athletics start.

Full price tickets will be �10. Tickets for young people aged 16 or under and seniors aged 60 or over will be for �5.

Approximately 70,000 Olympic Park tickets will be available as part of this sale, and further tickets will be available closer to Games time.

New tickets, for the Orbit and for events including the cycling road race at Box Hill, Surrey, will go on sale on May 29.

Tickets to the Orbit will cost �15 full price and �7 for young people aged 16 or under and seniors aged 60 or over. These tickets should only be purchased by people who have an Olympic Park ticket or a sport ticket for an event in the Olympic Park for the day they wish to visit the Orbit.

Remaining tickets for the Paralympic Games will go on sale from 11am on May 21.

LOCOG has also confirmed its ‘babes in arms’ policy, which will allow babies aged 12 months or under access to all venues, apart from Wembley Stadium, St James’ Park, Old Trafford and North Greenwich Arena, without a ticket.

Babies must be securely strapped to their parent or carer by way of a baby carrier, sling, papoose or similar.