By Andy Silvester A June event to which one of our reporters was scheduled to speak – a private dinner of London’s great and good – has been pushed back until September. The election has been given as the reason, but even the organisers acknowledged London is largely absent from the debate apparently gripping the country. The capital is out of step on everything from immigration to taxation to public services. It is certainly, thanks to a generation of 20- and 30-somethings who view the housing ladder as a now almost ethereal concept, in a very different place when it comes to planning. Keir S…