Take That generated �12.8m in online resales, Tixdaq said

"Second-hand" Take That tickets generated �12.8m in online sales across the UK's 25 biggest sites, it said.

Led Zeppelin's gig at London's O2, meanwhile, produced the highest average ticket price at �707.97 despite measures to prevent resale, it added.

Tixdaq monitors secondary ticket sales on the websites.

MOST EXPENSIVE RESOLD TICKETS Led Zeppelin - �707.97 Electric Proms: Paul McCartney - �498.14 Electric Picnic - �360.96 The Liverpool Sound - Paul McCartney - �330.00 Liza Minnelli - �261.93 Source: Tixdaq

Tickets for Paul McCartney's gig at the BBC Electric Proms were the second most expensive at an average of �498.14 per ticket, while third were tickets for Ireland's Electric Picnic festival, fetching an average of �360.96 each.

Tixdaq spokesman Will Muirhead said secondary ticket exchanges had created a huge new market in the last couple of years.

"No wonder artists are concerned that they do not generally share in the proceeds," he added.

In January, a committee of MPs said that artists and sports bodies should share profits from tickets resold on internet auction sites.

BIGGEST GROSSING EVENTS Take That - �12.9m T in the Park - �8.7m V Festival - �6.8m Spice Girls - �5.3m Reading Festival - �5m Source: Tixdaq

In a report on touting, they stopped short of calling for a ban, but said online touts must "clean up their act" because they exploit fans.

The Culture, Media and Sport select committee said up to 40% of tickets were being sold on the internet.

The Resale Rights Society (RRS) - representing the managers of the Arctic Monkeys, Radiohead and Robbie Williams and more than 400 other acts - is lobbying for a levy to be added to resold tickets.