Single Transferable Vote (PR-STV) is the original British proportional system.
The aim of proportional representation is to produce a legislative body where the voters are represented in proportion to how they voted.
PR-STV is used in Ireland, two Australian territories and was used at the provincial level in Alberta and Manitoba for 30 years (the politicians got rid of it out of partisan self interest).
PR-STV was the model recommended by the world class BC-Citizens Assembly. Their top three values were proportional representation, local representation and voter choice. They also felt STV might reduce the iron grip of parties over candidates and MPs. In 2005, 58% of voters in BC chose BC-STV.
PR-STV is a candidate centered PR system that delivers proportional results along party lines, while giving voters the most say over which individuals are elected.
With PR-STV, voters elect a team of local MPs in a multi-member riding using a ranked ballot.