A Green Day T-shirt reportedly on sale at one of the band's recent shows in Japan appears to list upcoming gig dates in London and Reading.
The band have already announced a show that appears to fulfil the listed date on the T-shirt at London's Shepherds Bush Empire this week, leading to further speculation about an appearance at Reading Festival this weekend.
Frontman Billy Joe Armstrong also reportedly posted a picture on Instagram, which now appears to have been removed, with the suggestive message: "Hello England! What rhymes with shredding ??!!"
Tonight (22 August) the band are set to perform live on Zane Lowe's Radio 1 show from 7pm ahead of their London show tomorrow.
Green Day are leading up to the release of their new album 'Uno!'; the first in a series of three. The band have also announced that they intend to do a 3,000 date world tour following the release of the trio of albums.
It was also reported yesterday (21 August) that Green Day will feature in a specially created edition of the game 'Angry Birds' which will be available later this Autumn.
Tickets for Green Day's show at London's Shepherds Bush Empire this Thursday (23 August) are on sale now. For more information visit Gigwise Gig Tickets.