tron,
brief explanation of AV.
You rank parties according to preference, everyone has the same choices no unfairness, if you would rather a green mp then vote green, if you don’t want a tory you do not rank them at all, you are able to give a better indication of what your want.
All votes are counted, if one person gets more than 50%+1 the end they have won.
IF not.
The last placed party is deleted from all ballots and a recount begins. All votes are recounted the only difference is that whereever the last placed rider appeared they no longer exist.
Votes recounted, if one person gets more than 50%+1 the end they have won.
if not,
The last placed party is deleted from all ballots and a recount begins. All votes are recounted the only difference is that whereever the last placed rider appeared they no longer exist.
…
Repeat until someone gets more than 50%+1
I think one thing to consider is FPTP, you can get a vast majority who do not want the winner. A vote of 30% regularly gives the win, which means 70% DID NOT WANT THEM, so the choice of the majority has been denied.
AV gives you the least unpopular winner.