France has hit out at "industrial-scale" ticket fraud at Saturday's Champions League final despite a raging row over policing of the event.
Ministers acknowledged "difficulties" in managing crowds at the final in Paris, but say organised fraud was the "root cause" of the problems.
Chaotic scenes saw Liverpool supporters with tickets waiting in huge queues, and French police using pepper spray.
UK Prime Minister Boris Johnson is said to be "hugely disappointed".
The final was delayed by 35 minutes by the trouble outside the stadium, with Liverpool losing the match against Spain's Real Madrid 1-0.