Planning laws should be relaxed around cities such as Oxford in order to create ‘super hot economies', according to leading academics. Dr Tim Leuning and Prof. Nick Crafts, both from the London School of Economics, said cities such as Oxford and Cambridge have the potential to become economic powerhouses, but their growth is being constrained by planning laws. ‘High-skill cities have the potential to be centres of high-wage agglomeration cities, just like Liverpool and Manchester a century ago,' they said.