 Blackburn's abstract paintings are held in the private collections of Paul Zuckerman and Natalia Grosvenor, Duchess of Westminster.In addition, his paintings are housed in university collections across Britain, including Cambridge, Kent, Essex, Newcastle, and Dublin.In 2008, he returned to Auckland for a show at the ARTIS Gallery entitled "The Muriwai Paintings"; this was followed by a show at the Osborne Samuel Gallery and Lemon Street Gallery in London in 2011.