It is false that there is a lack of choice now. There are plenty of other parties that voters could vote for if they believe the main two parties do not provide them with the choice they want. On the right there is UKIP and on the left the Greens and also other much smaller more extreme parties standing pain a few constituencies. If there were sufficient numbers who want to vote for a more left wing agenda then the Greens would be doing much better than they are – they currently only have one seat.