Sculptor, stained glass designer, painter – especially of shipbuilding on the Clyde – and teacher at Dundee High School, born in Thornhill, Dumfriesshire. Studied at Ayr Academy, in Glasgow to be a marine engineer, then at Glasgow School of Art under Robert Anning Bell and Maurice Greiffenhagen. Halliday was elected SSA in 1943 and was a founder-member of the Guild of Aviation Artists in 1963. J D Fergusson included him in his New Scottish Group. In 1947, with the poet George Bruce, Halliday edited Scottish Sculpture. He showed at RA, RSMA, RSA, Royal Glasgow Institute of the Fine Arts, Paris Salon and elsewhere abroad. Halliday carved the war memorial in the parish church of Wormit, Newport-on-Tay, Fife, where he lived for over 50 years; also the coat of arms for Newport Town Council; designed several stained glass windows, including Ayr and Dundee Parish Churches; and painted a large mural of the Battle of Narvik for the Royal Naval Dockyard, Rosyth.