The England faithful won praise for their behaviour during the summer, though there were reported to have been ugly scenes ahead of the game against Spain in Seville last month and prior to a friendly with Holland in Amsterdam earlier this year, leading to police issuing a reminder of what is expected of them in Portugal next year.
The combination of Portugal's proximity and the abundance of cheap flights mean that the 'Three Lions' could be roared on by a significant following, leaving lead football police officer Deputy Chief Constable Mark Roberts to urge fans to be on their best behaviour as well as suggesting that alcohol could be banned from sale to travelling fans.
"What we want to see in Portugal is a return of fan behaviour as it was in Russia last summer - fans helping to create a friendly and celebratory atmosphere,' he said. 'We are, however, conscious we could return to the behaviour displayed in Amsterdam and Seville.
"The mindless behaviour of a minority of travelling fans there was disappointing to see and will undoubtedly influence the way in which future venues and local police plan for and approach England supporters ahead of the tournament in 2019.
"We will be working closely with the FA and the local police force in preparations for the forthcoming tournament.
"Where appropriate, we will always seek to use the banning order legislation against those seen to be involved in football-related disorder, and there may be conversations to be had around licensing restrictions as it is clear alcohol is often at the root of the problem."