On 27 January 2017, it was announced that Tesco had reached an agreement to merge with Britain's biggest wholesaler Booker Group to create the UK's largest food group, there are however concerns over market dominance with Tesco being Britain's largest food retailer and Booker being the UK's largest wholesaler. It was announced in March 2017 that Trevor Masters, International Chief Executive, would be leaving in May after 38 years with the company. On 1 April, Tony Hoggett became Tesco's CEO for Asia, and Matt Simister became CEO for Central Europe. Also in April 2017, the company confirmed it would sell its in-shop opticians' business to Vision Express. In June 2017, Tesco announced a major cost-cutting initiative that would reduce the company's workforce by over 1,200 workers. Key reductions included over a quarter of its employees in Welwyn Garden City and Hatfield, and the closure of the call centre in Cardiff. The company hoped to reduce costs by £1.5 billion.