Fraser Bond are the leading lettings and property management agents for Trinity Square - London TW3. Trinity Square is a residential development in Hounslow, London TW3. Galliard Homes converted the headquarters for American Airlines into a new residential complex positioned in the heart of Hounslow’s town centre. Originally built in the 1980s, Trinity Square was extensively refurbished to offer studios and one bedroom apartments. The three apartment blocks encircle the development’s full-height 5-storey central atrium.