Leona Lewis leaves the studio in west LondonCredit:PA Pop stars including Rita Ora, James Blunt and Leona Lewis have spent the weekend recording a charity single to raise money for the Grenfell Tower victims.The cover of Simon and Garfunkel’s Bridge Over Troubled Water is expected to be released this week and is tipped to raise several million pounds.It was the brainchild of Simon Cowell, 57, who took action after watching harrowing news coverage of the blaze. He said many artists had asked to take part. “It’s really inspiring to see people come together,” she said, “It gives you hope in humanity.”As for the song, she added: “It sounds beautiful.”Ora, 26, grew up in west London and said she used to play in the streets around Grenfell Tower. She was among those who visited the scene to help distribute supplies to residents left homeless by the fire last week. Gareth Malone arrives at a studio to help with the recording of the charity single Credit:PA Other singers who have agreed to take part in the project are said to include Paloma Faith, Emeli Sande Craig David and members of One Direction.The singers have been recording the single at the Sarm Music Village in west London, just a few minutes’ walk from the blackened tower. Emeli Sande arrives at a studio to help with the recording of the charity singleCredit:PA After recording her part, Sande said it was a “real pleasure” to sing on the track. Chorister Gareth Malone has put together an ensemble of 300 people, made up of local choirs and local people.He said: “I just think we need something really positive at the moment.”Singing absolutely cannot fix anything, a record cannot fix anything, but we might be able to raise some money, we might be able to touch a few hearts.”To be frank I don’t care what it sounds like, it’s just about doing something good.” Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.