A former union official went to the home of former prime minister Julia Gillard and gave cash to workers doing renovations, a royal commission into union corruption has heard.

Ralph Blewitt, the former secretary of the Western Australia branch of the Australian Workers’ Union, told the commission he had $10,000 or $20,000 in cash when, in 1994, he went to Ms Gillard’s Melbourne home to meet Bruce Wilson, his union boss and Ms Gillard’s then-boyfriend. In an extraordinary opening…