Monray Marsellus Botha. REVISITING AN OLD FRIEND: WHAT CONSTITUTES “A MATTER OF MUTUAL INTEREST” IN RELATION TO A STRIKE? A TALE OF TWO RECENT CASES Pikitup (SOC) Ltd V SA Municipal Workers Union on Behalf of Members (2014) 35 ILJ 983 (LAC); And Vanachem Vanadium Products (Pty) . Obiter 2015, 36.