In 2005 he released the critically acclaimed opera , Ã a Ira , which would go on to top the classical charts in America and Britain , as well as joining Nick Mason , Richard Wright and David Gilmour , for an historical performance at the 2 July 2005 Live 8 concert in London 's Hyde Park , Pink Floyd 's first public performance with Roger in 24 years . On 2 July 2005 , he reunited with Pink Floyd bandmates Nick Mason , Richard Wright , and David Gilmour for the Live 8 benefit concert , the group 's only appearance with Waters since their last performance with him 24 years earlier .