P165 CEEFAX 165 Sat 1 Jul 18:57/16 WORLD MANDELA USES FUNERAL TO URGE UNITY South African President Nelson Mandela has joined thousands of mourners at the funeral of an African National Congress activist. Harry Gwala, a Zulu critic of Mr Mandela's policy of conciliation, died of heart failure aged 74. Mr Mandela usjh the funeral to utgj an ind to black on black violence between the ANC and its rival, the Inkatha Freedom Party. It was time to stand up for peace and unity, hj told moutnjrs in Jan Smuts stadium in Pietermaritzburg. Next News World Newstound Wrathjr