Richard Ashcroft will also perform at this year's festival
Rage Against The Machine guitarist describes influence band had on him as a musician
Roger Daltrey and Pete Townshend performed 'Who Are You?' on Fallon
Band describe late singer as 'a true icon of music and art'
Band will play the SSE Arena in London on February 13, 2016
Doctors have told frontman Daltrey to rest
Shows in San Diego, Anaheim, Las Vegas and Los Angeles have been cancelled
Blog post on band's official website includes accusations of an unknown person altering their equipment
The band said aim was 'to send you home happy and maybe a bit deaf'
The band also paid tribute to deceased bandmates ahead of Glastonbury appearance on Sunday