fiona irving, bbc south east today.nee injury ended his dreams of playing, he turned to refereeing grassroots games. for the last 44 years that's exactly what he's been doing — and at the age of 90, he shows no signs of slowing down any time soon. hannah gray has been to meet him. 0k. frank foster doing what he enjoys most. this 90—year—old great—grandfather from sheffield referees about three times a week. i just love football. being out in the fresh air. i had a 98% mark in my referee exam. i wanted to give that back out, whether it be boys, girls, men 01’ women. i just love it. frank played for bamford football club back in the 1950s. after a knee injury, he couldn't play in the team any more, but he's now in his 44th year of refereeing. my legs are tired afterwards, because i don't have linespeople, and i anticipate a move and go with it. and if i get any arguments, i'm straight in, talking to them. i don't talk down to them. that's rubbish, that. just talk to them naturally. spectators are often stunned to learn hi