LONDON (Reuters) – British retailer John Lewis Partnership announced the first three locations where it wants to build rental homes, part of its diversification plan to generate 40% of profit from outside its core business by 2030. The employee-owned partnership, which runs John Lewis department stores and the Waitrose supermarket chain, said last July it would build 10,000 rental homes in the next decade with half of them being developed through its existing property portfolio. It said on Thursday the first three proposed sites include building over Wait…