LONDON (Reuters) – British supermarket group Morrisons has teamed up with rapid delivery firm Gopuff to provide its groceries to shoppers’ homes in as little as 15-20 minutes, the companies said on Friday. They said the multi-year partnership will allow Morrisons to bring thousands of fresh food, own-brand and branded products to Gopuff’s platform. Gopuff currently serves customers in more than 20 cities in the United Kingdom. Bradford, Northern England-based Morrisons is Britain’s fourth-largest supermarket group after market leader Tesco, Sainsbury’s and Asda. A raft of new firms, including …