“Let’s get together and do it again,” sang the Beach Boys, reunited for their 50th anniversary. But behind the harmonies the California group has spectacularly fractured in the middle of a UK tour after Brian Wilson and his fellow founder members were told they were being replaced. After years of squabbling, Wilson, hailed as the compositional genius behind the Sixties veterans symphonic hits, agreed to re-join the surviving founder members for a new tour. The quartet even recorded their first album of original material together for 20 years. This week Wilson, 70, was left bewildered after his cousin Mike Love, the group’s frontman, issued a statement announcing that the Beach Boys would continue to tour, with second generation member Bruce Johnston but without their chief songwriter and the other original members, Al Jardine and David Marks.