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Ticketmaster subsequently denied using "dynamic pricing" to manipulate prices.

Amid the fall-out, Oasis issued a statement saying they had no "awareness that dynamic pricing was going to be used" in the sale of tickets for the initial dates.

The CMA did not comment on the issue of dynamic pricing, but said that Ticketmaster made it difficult for Oasis fans to make "informed choices".

For some tours, including Beyoncé's last one, prices go up as they are adjusted, based on demand, due to Ticketmaster's "dynamic pricing" scheme.

Andrew Parsons was appearing before the Business and Trade Select Committee, after fans slammed his company's "dynamic pricing" of Oasis reunion-tour tickets last summer.