Over 20m people have already registered for tickets for Led Zeppelin's one-off reunion show in London, the promoters have said.

According to internet service provider Pipex, fans are trying to register for the lottery tickets for the 26 November concert at London's O2 Arena at a rate of 80,000 per minute.

The website for the concert, a tribute to the late founder of Atlantic Records, Ahmet Ertegun, had crashed with demand.

A spokesperson for the show said: "The message is to be patient. The website will be open until midday Monday 17 September for anyone wanting to register. It is not 'first come, first served' and all successful applicants will be entered into the ballot for tickets to be drawn at random."