The news that 83 per cent of Conservative voters are over 45, compared to 53 per cent of Labour voters, is depressing. That was a finding of a poll carried out by Hanbury Strategy for Onward, a right-of-centre think tank that’s just produced a report called ‘Generation Why?’. More alarmingly, Hanbury discovered that the ‘tipping point age’ — the median age at which a person is more likely to vote Conservative than Labour — is 51.