Radiohead singer Thom Yorke has asked people selling their tickets for Friends Of The Earth's The Big Ask Live concert to donate their proceeds to the charity.
The band and organisers have been left frustrated after tickets for the show at London KOKO (May 1), which features Yorke and Jonny Greenwood, started trading for inflated sums of money online.
The gig completely sold out after going on sale at 12pm on March 11.
Now, writing online, Yorke has asked for people to donate their cash to the charity.
He said: "Might I suggest that those selling their KOKO tickets on eBay for stupid money gives a contribution... say 30 percent of their proceeds, back to Friends Of The Earth, for whose benefit we are all doing this show. Seems only fair, unless you're a shallow____, don't you think?"