The My Generation hitmakers closed out the three-day music extravaganza last month (Jun15), but they claim they had no intention of performing at the summer bash this year (15) until organisers reached out after Prince had a change of heart.

In a post on their website, group founders Roger Daltrey and Pete Townshend write, "Not many know that we were a last-months addition to the show, replacing Prince who decided not to come this year."

The reclusive Purple Rain icon had previously been booked to headline the 2014 event, but scrapped the gig in Somerset, England after news of his appearance leaked online. He was replaced by British rockers Kasabian.

Meanwhile, The Who also suspect someone tried to ruin their big Glastonbury moment after discovering their equipment had been tampered with before their show.

Recalling the events leading up to their set, the bandmembers state, "As we began to prepare our coming changeover, we found someone had sabotaged the carefully-tested audio connections for much of our gear. We've never seen that before, but we're good at plugging things in, so all damage was repaired in time."

The Who did have to overcome difficulties with their onstage monitoring system during their headlining set, and even though they recovered well, guitarist Pete Townshend wasn't happy with their performance, dubbing it "one of the very worst the band had ever played".