Liberal Democrats write off the North

The Policy Exchange has written a report that essentially says that regeneration of some northern communities is futile and the best thing for many of the people there is to move south. There is some other reasonably good stuff about devolving regeneration monies to Local Authorities, but the central idea that whole towns and cities should essentially be written off is as David Cameron said 'insane'. So, who wrote this claptrap? Well, according to the Telegraph two of the culprits at least are Liberal Democrats. So, why is David Cameron being pressed for comment. Where is Nick Clegg when you need him?