His first full season (1972–73) was coincidentally the last one for another Great Yarmouth referee who achieved honours – Norman Burtenshaw.
His next appearance at Wembley was as a senior linesman to Clive Thomas in the 1976 FA Cup Final between Manchester United and Southampton, which the Saints won 1–0 through a goal by Bobby Stokes.
In 1978, he made yet another appearance at Wembley this time as the referee for the FA Challenge Trophy Final between Altrincham and Leatherhead.
He had refereed the Sussex club earlier in the competition at Anfield when they pulled off a shock victory in a fifth round tie, Liverpool also missing a penalty.
Grey is now actively involved with Gorleston Football Club (local town team in The Premier Division of the Eastern Counties League) as an Honorary Vice President.