King's College London academic Loretta Lees reported that much of Inner London was undergoing "super-gentrification", where "a new group of super-wealthy professionals, working in the City of London the financial industry, is slowly imposing its mark on this Inner London housing market, in a way that differentiates it, and them, from traditional gentrifiers, and from the traditional urban upper classes ... Super-gentrification is quite different from the classical version of gentrification. It's of a higher economic order; you need a much higher salary and bonuses to live in Barnsbury" (some two miles north of central London).