The Metropolitan Police confirmed a “small number” of its officers would be on duty for Tuesday’s game, with a spokesman telling The Telegraph: “We have links with the Russian police and will be working closely with them.”

The club, who are not offering official supporters’ transport for the match, are also expected to bring some of their own stewards.

Supporters’ Trust secretary Katrina Law said: “Obviously, it’s up to everybody to be a little bit more vigilant than they perhaps normally would.

“We’re always concerned about the safety of our fans but if the club are confident and the Foreign Office are saying that it’s fine to travel there, and they’ve take enough precautions to make sure that our fans will be in the stadium safely, then that’s our bit.

“We can’t legislate for what individual travellers will do when they’re over there.

“You’ve got to be a bit respectful as well. You’re going to someone else’s city, so the club are always very keen on, ‘Don’t display your flags over their historic monuments’, and that kind of thing that is going to wind people up.

“It’s a real shame if fans didn’t want to explore – Moscow’s a great city. I would fully expect them to go off and do their little tourist bit but perhaps not draped head to toe in lilywhite and blue.”