Martyn Walter Margetson (born 8 September 1971) is a Welsh football coach and former professional footballer who is a goalkeeping coach for the England national team. A youth player at Manchester City, where he went on to appear over 50 times, he spent time on loan at Bristol Rovers, Bolton Wanderers and Luton Town before moving to Southend United on a permanent basis in 1998 where he remained for one season, joining Huddersfield Town in 1999. After signing for Cardiff City in 2002, he went on to win his first and only cap for Wales in a friendly with Canada in May 2004.