Earlier this week standing price tickets for Cardiff, London and Edinburgh were advertised as £135 plus fees. But angry fans said online they noted "in demand" pricing on Ticketmaster had increased prices to £355 plus fees.
Ticketmaster say they do not set ticket prices.
A link on its website states: "Promoters and artists set ticket prices. Prices can be either fixed or market-based. Market-based tickets are labelled as ‘Platinum’ or ‘In Demand’."
Ticketmaster confirmed that fans don’t get anything else for the price increase.
The Advertising Standards Authority (ASA) told the BBC it could not pass comment on Ticketmaster’s pricing in this instance.
“We encourage anyone with concerns to get in touch with us and we’d carefully assess whether there were any grounds for action,” an ASA spokesperson said.
But they added: “Our rules (the Advertising Codes) are clear – quoted prices must not mislead.”
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