Painter, photographer, printmaker and designer, born in Leeds. He studied design at Bradford College of Art and Design, 1954–8, then painting at Royal College of Art, 1960–3, gaining an Abbey Minor Travelling Scholarship in the latter year. After holding a solo studio show in 1969 Loker had a one-man at Angela Flowers Gallery and ICA the following year. The 1970s saw him showing at John Moores Exhibition in Liverpool on several occasions, another key appearance being in New British Prints in New York and touring in 1974, yet another Arts Council Collection 1975–6 at Hayward Gallery in 1976. After that Loker exhibited abroad in France, Netherlands and Norway. He continued to show with Angela Flowers and in 1981 his Ten Years’ Work Exhibition was at Arnolfini Gallery, Bristol and tour.