Pet Shop Boys have said they would be up for playing Glastonbury's 40th anniversary next year -- though they admit they haven't, as yet, been asked.

The pop duo told BBC 6 Music they were keen to play the festival, despite only performing there once before, in 2000.

"We played the mainstage at nine thirty on Saturday night, and it was an amazing experience as we wandered whether Glastonbury wanted to see the Pet Shop Boys," frontman Neil Tennant said.

"Whether we were too dance or pop or something for them and it really went down fantastically well."

The duo admitted they haven't been asked yet to appear, but promised to bring special guest vocalists should an invitation arrive.

"A good song for us to do with people is 'What Have I Done to Deserve This' as sadly Dusty Springfield isn't around anymore. We've done it with Melissa Etheridge in America before, Lady Gaga at the Brits, Cerys Matthews from Catatonia when we did Glastonbury 2000... there's always a little vacancy there for someone."

Tennant also added the pair are in no hurry to call it a day after 25 years of releasing records. "No we don't think like that, we don't really think very far ahead. We might wake up one morning and think 'That's it.' But I think when you've got a lot of creative energy you want to carry on."