Norwich City Councillor Martin Schmierer issued the warning to the management of the city venue after football fans said they were left fearing for their safety at the showing of Sunday evening's match.
England supporters claim the screening at the St Mary's Works site became chaotic when people were entering the venue without tickets.
They said that technical issues meant that one of the two outside screens didn't work, leading to a crowd crush as people tried to watch the game on the remaining screen, while others were climbing on unstable roofs to see the TV.
Martin Schmierer said he hopes Junkyard has learned its lesson (Image: Newsquest)
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