Could you be the next Matthew Turner. Former Leeds United and Swansea City Goakeeper Glan Letheren . UEFA Pro licence holder & professional Goalkeeping Coach Glan letheren has previously worked with Swansea City and Leicester City and is associated with many premier league clubs, and also is an international Coach/Scout, aiming to find the best talent in the world. pictured with Matthew Turner who has now signed for Leeds United. .