The conventional image of the average
In fact, this is almost exactly the profile you get if you look up UKIP supporters on YouGov's new profiler tool:
If the traditional analysis of UKIP supports holds, the voters in the Rochester and Strood by-election - where UKIP is currently leading Conservatives in the polls by 12 percentage points - should fit comfortably into the picture painted by YouGov's profile above. But the data shows otherwise.
Although according to YouGov the average UKIP supporter is over 60, data from the 2011 Census suggests that Rochester and Strood is on average younger than the rest of the country:
Moreover, although polls suggest only around 12% of UKIP supporters nationally have A-level qualifications or higher, the local population of Rochester and Strood demonstrate a significantly higher level of educational achievement.
So what's going on? First, the figures illustrate the danger of making sweeping assumptions about where UKIP derives its support from. While it was a fringe party, the profile of its base may have been easier to establish but with recent polls giving it between 13-17% of the national vote, these stereotypes are likely to be less and less accurate.
The key point to remember is that as the party grows its support base is changing with it. According to a recent survey of 5,701 UKIP supporters in October by YouGov, the party's supporters are getting significantly younger:
And, worryingly for Labour and the Liberal Democrats, there are growing signs that UKIP's appeal is growing beyond frustrated Tory voters. While in January 2013 almost 60% of respondents said they had voted Conservative in the 2010 General Election, that figure has now fallen to 48%. Meanwhile the percentage of UKIP supporters who claimed to have voted Labour in 2010 has increased from 7% to 15%.
That is, Labour is starting to lose large chunks of votes to UKIP too!
These factors help to explain how UKIP has managed to turn what should have been a tight contest in Rochester and Strood into what could be a procession for its candidate Mark Reckless. Betfair, which has matched over £300,000 worth of bets on the result, currently gives UKIP a 97% chance of victory.
On Wednesday Faisal Islam, Sky's political editor, reported that the Labour and Lib Dem campaigns had received "hand signed letters from Con candidate asking to "lend their votes"". If that isn't sufficient illustration of quite how panicked Westminster is becoming about the rise of UKIP, I don't know what would be.