Some Australian state elections using the Alternative Vote show that voters are casting fewer second preferences, or even none at all. Would the same happen in the UK?

Australian state elections using the Alternative Vote hold the key lessons for how AV might operate in the UK. Colin Rallings and Michael Thrasher have argued that they show many or most voters not using the opportunity to cast a second preference at all, but just ‘plumping’ for their top candidate alone. The leading Australian expert Antony Green explores whether they are right to draw this likely lesson for AV in the UK.