A former semi-professional player has described how quick-fire national and international double delight has given his career a new lease of life. Ex-Gravesend & Northfleet and Erith & Belvedere man Gary Groom helped England over-50s win the World Nations Cup and claimed The Walking Football Association (WFA) National Finals crown with his club, Bexley, last year. After giving up veterans football, he thought his playing days were numbered. He said: “I was with Tottenham and Arsenal as a youth, and then captained Charlton’s youth team. I was Rob Lee’s captain! “But when push came to shove, I d…