For years, the Lib Dems have struggled with the accusation of ‘irrelevance’. They have pointed out quite rightly that smaller parties struggle against an electoral system which works against them, and media which give most of the attention to the two big parties.

For Nick Clegg to now lay into the SNP leader as "irrelevant" and a "two bit player" smacks of double standards. Nether does it do anything to encourage respect, or aid the development of a ‘new politics’. But the most important point is that it perpetuates an arrogant narrative also held by the two big parties, which suggests that smaller parties have little of value to say.

How powerful is your vote? There's now a new website which can tell you.

In the 2005 election, more than half of all voters voted against their winning MP. There were an estimated 25 million wasted votes, which were 'thrown away'.

In the absence of a proportional voting system, in the UK, the voters with real power to choose the government are those who live in marginal constituencies, and these are who the main parties and media focus on.

The Electoral Reform Society (ERS) have produced a fantastic tool which will highlight how the big party leaders will be spending their time this election - targeting a very small number of marginal seats. It will be very revealing about where their values lie.