Leon, the London-based healthy fast food chain, has appointed former Burger King chief executive Brad Blum as it looks to step up expansion. The Financial Times reports today that the company, which currently operates 11 sites, has also signed a deal with American firm HMSHost, which specialises in running food outlets in transport hubs, to open their first two franchised outlets. The first is to open at King’s Cross station on 18 March, with a site at Heathrow set to follow, along with another three in similar locations. The company could quickly add 30 more franchised sites if these are deemed successful, co-founder Henry Dimbleby told the FT. “We believe that there will be a few global players who will succeed in serving good fast food. Our ambition is to be one of those.”