Millions of people have rushed to register for tickets to see a one-off Led Zeppelin gig after the band announced that they would reform for one night.

The group has not performed together for 19 years and decided to get together for a show at the London O2 Arena in November, to mark the death of music mogul Ahmet Ertegun who died last year.

But promoters have revealed that they have been finding it difficult to cope with the demand for the tickets on the band's website, after around 20 million people tried to register within the first day.

Tickets will cost £125 a piece and to get a ticket fans must register online before September 17 - the 20,000 tickets will then be allocated by a public ballot.

Promoter Harvey Goldsmith warned fans against using auction sites like eBay once they get the tickets, saying: "We just hope and pray that those people who get a ticket in a ballot are just going to act accordingly. They might have paid the money but they ain't going to get the ticket."