He and Pete Townshend are midway through their last-ever major road trip, which includes a return to London's Hyde Park in June before ending in the US in November - although it may be extended into 2016.

Daltrey tells Rolling Stone: "My voice is fine. I'm enjoying playing. There's something about looking down the end of a telescope and seeing the potential end.

"It brings me joy. I've always tried to sing as though I'm singing a song for the first time - now I sing as though I'm singing the song for what might be the last time."