Fights broke out in Watford town centre on Sunday evening (July 12) following England’s defeat in the final of the Euros.
Large crowds of around 400 gathered around The Parade and officers and a police van became a target after the match with 30 incidents reported across the evening.
Chief Inspector David Partridge, who led the constabulary’s policing response to Euro 2020, said: “As per previous fixtures throughout the tournament, there was a substantial policing operation in place across Hertfordshire for Sunday’s Euro 2020 final and we worked closely with our partners and licensed premises to ensure everyone enjoyed the game safely.
“It was very busy compared with the previous England fixture and while the majority of fans acted in a responsible manner, sadly there were a few people who let the side down. We had 30 reported incidents throughout the evening, with five arrests.
“In Watford, a large crowd of approximately 400 people assembled post-match. An element of that crowd caused damage to a police van, a female was taken to hospital after being injured by flying glass and a man was knocked unconscious during an altercation.
“Additionally, two people are reported to have been injured during an altercation at a premises in Hatfield and disturbances were also reported in North Herts.
“While we fully understand the disappointment that many people will have felt, there is absolutely no excuse for this kind of behaviour. Follow up enquiries are being conducted at this time and those involved will be dealt with accordingly.”
England lost out on winning the Euros 3-2 on penalties after the final ended 1-1 after extra time.