King's Lynn Stars team boss Rob Lyon will focus solely on the club's 2011 Elite League return after stepping down from his Team GB role.
Lyon has ended his involvement with the national set up after two seasons, following talks with the sport's governing body (BSPA).
Lynn's successful team boss guided his country to the World Team Cup final last summer after a memorable win on home shale at the Norfolk Arena.
Team GB edged out old rivals Australia in front of more than 7,000 fans at Saddlebow in event two - but Lyon will not be in charge when the global event returns to Norfolk this summer.
The BSPA released a statement on Monday evening which read: 'After discussions between the British Speedway Promoters' Association and Rob Lyon it has been amicably agreed that Mr Lyon will not continue with his role as Team GB Manager.
The position will now be considered by members of the BSPA Management Committee. The BSPA would like to place on record their thanks for the hard work and effort put into the role by Mr Lyon over the past two seasons and wish him well for the future.'
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