London, 2016-Sep-14 — /EPR Retail News/ — Costa Express, the UK’s leading on-the-go coffee brand, today (Sep 12, 2016)  announces the installation of its 6,000th self-serve coffee bar in Tesco High Wycombe. The milestone puts Costa Express on track to achieve its target of over 8,000 machines by 2020. Following the £59.5 million acquisition of Coffee Nation…