Exactly a week after the general election, two men - 'Call me Dave' and 'Call me Nick' - walked side by side into the rose garden of No. 10 Downing Street to give their first press-conference as Prime Minister and Deputy Prime Minister, looking for all the world like men in love. It was a romance in which people wanted to believe. But it was also one that people couldn't help but mistrust. Most unnerving, however, was the sense that they both couldn't...