56% of voters at last month’s General Election are represented by MPs they voted for. That could have been much worse, but the figure is as high as it is probably because of tactical voting so, although many voters are represented by the Labour MP they voted for, they would have preferred a Lib Dem MP or vice versa.
Even the worst form of STV (2-member constituencies) would have been much better in this respect. Although it would not have been very proportional, it would have been more proportional than FPTP and 67% of voters would have voted for winners. To put it another way, 67% (not 56%) of voters would be represented by MPs for whom they voted.
With STV in 3-member constituencies (which would be quite proportional), the figure would rise to 75%.
With STV in 4-member constituencies (which would be more proportional), the figure would be 80% while, with STV in 5-member constituencies (which would be adequately proportional and is the constituency size the ERS recommends), the figure would be 83%.