Dubai Duty Free (DDF), the world\'s largest travel retail operation, will part-finance the development of a new concourse and terminal, part of the Dh28 billion expansion of Dubai International Airport, the world\'s fourth biggest international passenger hub, a top official said. \"I am glad to say that Dubai Duty Free and Dubai Airports will mainly finance the development of Concourse 4 at Dubai International Airport,\" Colm McLoughlin, Executive Vice-Chairman of Dubai Duty Free, told Gulf News in an exclusive interview. This would be the first major investment by Dubai Duty Free in a large infrastructure project following the construction of its Dh500 million headquarters and central storage at Al Ramool and the new five-star 293-room luxury hotel at the Aviation Club. The Dubai Government-owned entity has set up Dubai Duty Free Leisure — as a separate division to look after its leisure projects — including the Irish Village, the Century Village and the Dubai Tennis Stadium — owned by Dubai Duty Free.