The second round of London 2012 Olympic ticket sales has opened for those unsuccessful in the first ballot. However users have reported problems logging on to the website due to high demand.

Some 2.3 million tickets are being sold for 10 days on a first-come-first-served basis on official London Olympics website, www.tickets.london2012.com

Tickets are available for 310 sessions, 44 of which are medal events, covering 20 sports - about 1.7 million for football and 600,000 for other sports, including archery and table tennis.

Some visitors attempting to buy tickets on the website have received a message during their transaction which states: “We are experiencing high demand.

“You will be automatically directed to the page requested as soon as it becomes available. Thank you for your patience.”

A London 2012 spokeswoman said: “The system is working, it has not crashed. Due to high demand some people are being held outside the system.

“For those in the system it is working and transactions are going through, but we are having to hold some people back from going through the site due to high demand.”

Some half a million tickets are priced at £20 or less. A further one million tickets are priced between £20 and £50.

Applicants will find out whether they have been successful within 24 to 48 hours of applying. Payment will be taken once the sale closes at 1800 BST on 3 July.

Less than half of those who applied got tickets in the first round due to high demand.

The London Organising Committee of the Olympic Games (LOCOG) has also said its predictions indicate more than one million tickets will become available between December 2011 and the start of the games.

Organisers expect the 2.3 million tickets going on sale in the second round will put them on track to reach £400m of the £500m target of revenue from ticket sales.

London 2012 sponsor Thomas Cook is offering UK short breaks and trips to the Games, and still has availability for athletics and swimming finals, plus the opening and closing ceremonies.

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