 Cosnett won the 1985 British Open, beating Welshman Peter Locke in the final.Despite winning one of the biggest prizes in the history of professional darts, Cosnett never managed to meet his new-found expectations which took him to #16 in the World Rankings.He competed in the 1985 BDO World Darts Championship, and won the opening round against Rab Scott, but was defeated in the second round by his fellow Englishman John Lowe.