Supermarket chain Waitrose, a subsidiary of the John Lewis Partnership, has announced plans to invest £1 billion ($1.31 billion) over the next five years to open 100 convenience stores and refurbish 150 existing outlets. The store upgrades will feature revamped service counters and expanded space for on-demand grocery orders, as well as branded concessions such as Crosstown doughnuts and Sushi Daily. Commenting on the move, Waitrose executive director James Bailey …