A variant of the Alternative Vote (AV) is AV+. This voting system was recommended for UK general elections as far back as 1998 by the Jenkins Commission.
AV+ uses part of the Additional Member System (AMS) and part of the AV system.
In AV+ the first vote elects a constituency representative using AV as opposed to the FPTP system used in AMS.
In the second part of the vote, the List system is used to vote for the party of your choice.
The whole idea of AV+ was dropped after the 1997 election but is currently the first choice of the Labour Party should electoral reform go ahead.
Advantages: supporters claim that AV+ in action is far more democratic than FPTP and ensures that any government is far more representative. It is also claimed that AV+ gives smaller political parties an opportunity to compete more fairly against the traditional ‘big’ parties and gives them a better chance of winning some seats in an assembly/government etc.
Disadvantages: The time it would take to collate the results could leave the UK in a political vacuum, which could, it is argued, lead to problems.