‘Tax avoidance by multinational enterprises is not new. But the current level of political will and public outcry on the issue is uncommon in the history of taxation.’ writes Antony Ting in The Conversation (12.11.14): ‘The upcoming G20 meeting in Brisbane promises to keep the momentum and reiterate the determination of political leaders to address base erosion and profit shifting by corporate groups.’ This article carries a timeline of events to date (see, in particular, 2013 and 2014).