The loud and proud return of Led Zeppelin was the most lucrative event of the year for the touts and fans at the centre of a heated row over the resale of tickets online, according to figures published yesterday. One of the leading online ticket resellers, Seatwave, said the average price for tickets sold through the site for Led Zeppelin's comeback gig at London's O2 arena was £7,425. Online resellers have effectively created a rolling market for high-profile gigs and sporting events. There is no legislation covering the resale of concert tickets and sporting events other than football matches but...