BBC | Pop stars including Dua Lipa, Coldplay, Sam Fender, Radiohead and The Cure have called on Sir Keir Starmer to honour his election promise to protect fans from online ticket touts.
More than 40 musicians have signed a letter urging the UK prime minister to "stop touts from fleecing fans" and cap the price that can be charged when tickets are resold.
The government launched a public consultation on the issue in January after complaints from fans, saying it would tackle touts who "are systematically buying up tickets on the primary market and reselling them to fans at often hugely inflated prices".
But seven months after the consultation closed, there has been no indication of when legislation might be introduced.
'Ripped off'
New research from Which? magazine found that some tickets to see Oasis at Wembley Stadium this summer were listed for as much as £4,442.
According to analysis by the Competition and Market Authority (CMA), tickets sold on the resale market are typically marked up by more than 50%.
In January, the government said it was considering a price cap of up to 30%.
Dan Smith from indie-pop group Bastille said "it seems crazy" that fans aren't protected from price hikes, when countries like Ireland and Australia have introduced caps on ticket resales.
"It's not surprising that the idea of a price cap has such widespread support from bands and artists," he said.
"With the support of the government we can all move to a situation where people no longer get ripped off by touts and genuine fans can easily resell unwanted tickets for their original price."