Yes: Chris Squire diagnosed with leukaemia, forced to sit out the band's Summer tour.

Founding YES bassist Chris Squire has been diagnosed with a form of leukemia called acute erythroid leukemia. As a result, he will be forced to miss the group's tour this summer for the first time to receive medical treatment in Phoenix, where he resides. He will be temporarily replaced by Billy Sherwood, who played guitar and keyboards as a touring member of YES in 1994 and as a full member from 1997 to 2000.

"This will be the first time since the band formed in 1968 that YES will have performed live without me," the 67-year-old Squire said in a statement. "But the other guys and myself have agreed that Billy Sherwood will do an excellent job of covering my parts and the show as a whole will deliver the same YES experience that our fans have come to expect over the years."

YES's co-headlining North American tour with TOTO will kick off on August 7 in Mashantucket, Connecticut.