If you’re not wild about the Conservatives, here’s some bad news: expect to see a lot more of David Cameron’s face on Facebook in the next few months. The Conservatives, who are set to outspend Labour by three to one in this general election campaign, are already using their vast pile of cash to fund adverts helping get their message across on Facebook. Spending on advertisements encouraging Facebook users to like’ the prime minister has helped the Tory leader’s social media reach in the last 12 months. Back in February 2014 he only had around 60,000 likes. Now it’s up to 470,000. That puts him well ahead of the 88,000 likes for Nick Clegg and – oh dear – just 67,000 for Ed Miliband. Even Nigel Farage only has 70,000, but then he’s probably not going for the online vote, is he? The Conservatives, on the other hand, definitely are. Social media is much beloved by politicians, who see it as a great chance to get their message across to voters without those...