All funds raised from the acoustic gig, at London's Union Chapel venue on 12 December (16) will go towards the charity's Christmas appeal to help vulnerable people off the streets this winter.

Years & Years frontman Olly Alexander said in a statement, "We're linking up with Shelter for the first time and putting on a cute intimate performance to help mark their 50th anniversary."

Praising the work of the charity Olly added, "No child should have to face homelessness at any time, let alone Christmas. As a band, we're well aware of the incredible work that Shelter does, and we're very, very happy to be able to do our part to help them make sure no-one is left to fight bad housing or homelessness on their own."

Shelter, which was founded in 1966 and offers support to people living on the streets or in substandard accommodation, has received the backing of a number of stars over the years including rockers Jarvis Cocker, Beth Ditto and Chrissie Hynde.

The charity's Chief Executive Campbell Robb said, "This is a fantastic way to help Shelter this Christmas, and enjoy an exclusive performance from Years and Years – who we're thrilled to have supporting us for the first time...

"Every penny raised from this very special acoustic gig will help Shelter to continue to be there for the thousands of families facing homelessness this Christmas."

Years & Years will be supported by unannounced special guests and one-off collaborators.