Telegraph letter writers, that most astute body of political commentators, are probably not alone in thinking that politics has taken some strange turns in recent years. The first coalition government since 1945 has led the country from the subprime to the ridiculous, lumbering from Leveson to Libya, riots to referendums, pasty-gate to pleb-gate, Brooks to Bercow, the Bullingdon Club to the Big Society. Five years is a long time in...