You are a West Ham United fan?
Up the Irons refers too West ham United soccer/football team, Steve harris bass player and legend from Iron maiden is a fan of West ham united and always adds 'UP THE IRONS' to there album credits
Im originally from the north west of the UK although I live in Oregon now, Im a Huge metal fan and I love Iron maiden! However my team is Manchester United
Just wanted to let you know that the saying 'up the Irons' is referring to the team not the band