AV is a superior voting system to FPTP principally because it goes with the grain of contemporary political life in Britain: it is better at reflecting the diversity and pluralism of the modern electorate, something FPTP conspicuously fails to do.
The upcoming referendum offers voters the choice between moving to the Alternative Vote (AV) or retaining First Past the Post (FPTP). The evidence presented in this report and IPPR's previous publication - Worst of Both Worlds: Why First Past the Post no longer works - shows that there is a strong case for reform.
However, there is no such thing as a perfect electoral system and we should be careful not to exaggerate the claims of AV. It is not a proportional system and so does not give all parties a fair share of seats in parliament.
Download the full results of the ippr/YouGov poll which is used extensively in this report.