Over the past five years, the pace of change in the European equities and ETF markets has been almost unparalleled. This in turn is fuelling demand from the buyside community for greater transparency in the form of data and metrics in order to achieve best execution, optimise their trading activities and ultimately make better informed decisions. Yet obtaining the quality of detailed, reliable and completely independent data required to analyse market structure changes has created its own set of additional challenges, not only for the buy-side and sell-side, but also for exchanges, trading venues and even policy makers and regulatory bodies. For many, the idea of a ‘consolidated tape’ is often the first solution that springs to mind. But would it be the panacea that firms seem to expect?