Virgin Money Giving will add 10 per cent to all donations made on its website on 23 and 24 April after its website crashed during the London Marathon yesterday.
The London Marathon is sponsored by Virgin and Virgin Money Giving is the official fundraising website for runners in the 26.2-mile race.
According to media reports, people who tried to make donations through the website on the morning of the race – 23 April – were greeted by a message from Virgin Money Giving apologising for the site being unavailable.
The website was still experiencing problems this morning.
A statement on the Virgin Money Giving Twitter account said that because the website was unavailable for part of the morning of the marathon, "to say sorry we will be boosting all donations made to charity through Virgin Money Giving on 23 April and 24 April by 10 per cent".
It said: "We hope that this will be well received by all the charities that our fundraisers support."
A spokesman for Virgin Money Giving said today: "Virgin Money Giving was not available for part of yesterday morning as a result of high demand.
"Some people might have had to try more than once, but our analysis shows that everyone who came back to make a donation has been able to do so. We will confirm figures for this year at the right time."
Last year, the London Marathon raised a record £59.4m, the tenth successive year the marathon had broken the world record for the highest amount raised by an annual single-day charity event.