Painter in oil and watercolour, draughtsman in pencil and teacher, born in Bury St Edmunds, Suffolk. He studied at Ipswich School of Art, 1952–6, then Royal College of Art, 1958–61, teachers including Colin Moss, Pif Fortin, Carel Weight, Ruskin Spear and Ceri Richards. Numerous mixed shows included RA Summer Exhibition, Phoenix Gallery in Lavenham and Highgate and with Norwich Twenty Group. Had a series of solo shows at Bramante Gallery, 1968–71; Thackeray Gallery, 1972–5; and Langton Gallery, 1976. Before his first solo exhibition, Hagger showed his oil on board cityscapes on the Green Park railings, self-effacingly signing them with an H. As he became successful he turned to canvas, put his prices up and signed with his full name.