“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, vol. 36, no. 1, Apr. 2015, doi: 10.17159/obiter.v36i1.11684.