The ONS, whose data is used by the government to help make decisions affecting millions of people in the UK, is under review following criticisms about its data. Fliss and James are joined by Professor of Economics at King's College London, Jonathan Portes who is also chair of the ONS Labour Market Stakeholder Advisory Panel. They also speak to Aled Maclean-Jones a former special advisor to the UK Treasury about the implications faulty data has on policy making decisions.