UK supermarket Tesco is hoping some of its staff will be granted "key worker" status so that the employees can afford to live in the expensive south east of England. High house prices in greater London are leading to staff turnover problems at some of Tesco's London stores. To help combat the problem, Tesco plans to build 3,000-4,000 full-price and affordable homes nationwide, above stores, over the next five years, reported BBC News Online.