By Amber Murray Mike Ashley-owned Frasers group has announced the acquisition of over one million square feet of retail space across three shopping centres in a huge new bet on physical retail. The shopping centres – in Exeter, Maistone and Gloucester – have a combined annual footfall of almost 17 million visitors and 1.015 million square feet. The biggest of these deals, the acquisition of 600,000-sq-ft Princesshay Shopping Centre in Exeter, was made with US-based asset manager Nuveen and the Crown Estate after the site was put up for sale earlier this year. Chief executive of Frasers, Michae…