The band sold out the 4,000-seat Royal International Pavilion within days of the original release of the tickets.
They have now sanctioned the release of more tickets and an eisteddfod spokesman explained: “The Pavilion actually holds slightly more than 4,000 seats but the contract with the band was for that number.
“But they have seen how popular the show is and have agreed to vary the contract so that we can now make these extra tickets available for sale.”
The tickets are available by telephone on 01978 862001.
See full story in the Leader