Australian pop-punk band 5 Seconds Of Summer have revealed that they will be making a special announcement tomorrow that will be of interest to their fans in the UK. 

Writing on their official collective Twitter page this afternoon (September 8), the heartthrobs explained that followers should keep an eye on their social media sites tomorrow at 8am GMT to see the exciting news:

"UK! we have a special announcement for you guys, check back at 8am GMT tomorrow if you wanna hear it!"

The 'Amnesia' hitmakers recently performed live at London's month-long iTunes Festival and told their fans that it was an amazing experience. Michael Clifford tweeted: "MY FACE IS DRIPPING RED thank you to everyone who came today London. Love you lots."

They have also begun working on a brand new album and Clifford admitted that there is a definite progression in their sound on this project: "I don't know if it's different. It's just maturing. Evolving... like a Pokémon."

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Watch the lads' iTunes Festival full set here: