Sainsbury’s, the UK supermarket chain, has rolled out what it describes as a on-demand, one hour delivery service app called Chop Chop, with goods delivered by bicycle. The Chop Chop app was initially made available to the Wandsworth area in London for a trial period, but now the retailer is looking to expand the service by adding 35,699 new postcodes in the capital. The new app allows customers to order …