In 1989 Askew then won the French Open and lifted his first title on TV, the Cockney Classic when he defeated Steve Smith.
He enjoyed a rich vein of form in 1993 reaching the final of the BDO British Open where he lost to Dennis Priestley.
A number of other good runs secured his debut at the 1994 BDO World Darts Championship but he was disappointing in losing out Ian Sarfas.
He was also selected to represent the English team in the 1993 World Cup and won the title alongside Steve Beaton, Ronnie Baxter and Kevin Kenny by defeating Wales 9–3 in the final.
Despite defeating Raymond Van Barneveld in the 1998 World Masters and reaching the semi-finals of the BDO British Open Askew virtually disappeared from the circuit for a few years.
He beat Chris Mason, Roland Scholten and Dennis Priestley in another fine run to the semi-final of the 2002 World Championship.
Askew produced some good form in winning a few matches but just fell short of his target, narrowly losing in the last 16 to Alan Tabern.