The letter, co-signed by Elton John, Coldplay and Central Cee, calls for a £250million package to "repair decades of dismantling music"
They join previously announced acts like Sam Fender and Blossoms
The BRITs Rising Star winner also explained how the victory only marks the beginning of his journey
The ceremony went down in London's O2 Arena on Saturday night (March 1)
"If British music is one of the most powerful cultural exports we have, why have we treated it like an afterthought for so many years?”
The winners in five categories will be decided this year by fans in a BRITs WhatsApp chat
Among the names announced so far are JADE, The Last Dinner Party and Teddy Swims
"We can’t wait to bring the biggest artists in the world to this brilliant city"
Charli XCX, Dua Lipa, The Last Dinner Party, Ezra Collective, Myles Smith and The Cure all lead the way for nods ahead of the ceremony next month
He has also been confirmed as the winner of this year’s BRIT Rising Star Award