Something for those 'Yes to AV'ers'

Note the image. One of the great claims by those in favour of AV is that the winner gets above 50% of the vote. Well, as the BBC's FiveLive radio program showed the other day, this is NOT always the case.
Because everyone is not obliged to have a 4th, 5th or 6th preference vote, situations like the above arise where no party gets above 50% in AV, and s party who gets just 16.9% of first preference votes (the Greens) have miraculously ended up a close second!

...so much for democracy