Matthew asked if there are any multi option initiatives used.
Not that I know off but there have been multi options on government
NZ 1992 electoral reform - 4 option by plurality - luckily one got a
Australia 1977 on the new national song - 2 preferences allowed and a
song even the composer describes as banal won against the 2 'extreme'
options - one being waltzing matilda
Sweden 1957 - 3 pension schemes - by plurality, non gained a majority
so the government was left making the decision
Sweden 1980 nuclear energy policy - ditto
British Labour party, when it talks about a vote on changing the
electoral system says it will copy the NZ format - if they do it by
plurality I predict the result will be a mess.