Leicester Lions captain Jason Doyle chalks up another big moment in his career on Saturday when he takes part in round four of the Grand Prix at Cardiff's Millennium Stadium.Doyle secured a place in this year's series after negotiating his way through a qualifying system that took him from Berwick to Poland and, finally, Italy.It was the accumulation of years of hard work to build up to this level after first arriving in this country to race in British speedway 10 years ago for the Isle...
