Photographs show the fan in his birthday suit yesterday (Thursday 17 June), seemingly holding is kilt in one hand as six Met Police officers led him away.
A Met Police spokesperson told LADbible: "On Thursday, 17 June, officers arrested a 25-year-old man for indecent exposure in Hyde Park. He was taken into police custody before being cautioned and released.
"On the same day another man - no further details - was arrested for the attempted theft of a police officer's hat, assault with intent of avoiding arrest and assault of emergency worker. He was taken to a south London police station where he currently remains.
"No further arrests."
The Tartan Army has descended on the capital ahead of Scotland's Euro 2020 clash with England tonight, which kicks off at 8pm today.
The Group D match is taking place at Wembley Stadium, and there will be a crowd of 22,500 in attendance - that's 25 percent of the stadium's capacity, due to Covid-19 restrictions.
It's the first time the nations have met in a major tournament for 25 years.
Scotland fans were only allocated 2,600 tickets for the match and were told not to travel down unless they had organised somewhere to watch the game.
However, it is reported that as many as 22,000 fans have travelled to London.
:soccer:The second #EURO2020 England match is tomorrow! But please, only come to London if you have a ticket for a match, fanzone or venue. pic.twitter.com/NWPoJKtfsc
- MPS Football Unit (@MPSFootballUnit) June 17, 2021
Many fans are heading to Hyde Park, as the normal gathering place of Trafalgar Square has been reserved as a fan zone for key workers.
Police have issued a 48-hour dispersal order in central London, giving them increased powers to remove drunken troublemakers.
Scotland fan Michael McLean, from Inverness, told BBC Scotland: "It's an amazing atmosphere so far. I think it seems that they've underestimated how many would travel down for the game.
"It's warm here and it feels like a normal football occasion. It doesn't feel like there's a pandemic on which I don't think is good in a way, but it's definitely good to enjoy an occasion after a year-and-a-half."
Emma Best, a member of the London Assembly and the Conservative group's spokeswoman on health, said it was a shame that the game couldn't be played in 'normal times', but the reality of Covid-19 could not be ignored.
She said: "I think it is concerning and we do need to do what we can to control the Delta variant.
"Like it or not, Scottish fans - and we must say English fans as well from across the country - will be in London in their thousands and so we do need a plan to manage that as carefully as possible.
"The Boogie song is being played everywhere I've been walking. It's a lovely atmosphere and you could be forgiven for thinking we are not still in the midst of a pandemic, and I I think that sums it up.
"What a shame that we can't have this match in normal times and really enjoy this occasion, but we are where we are and I do hope it's as safe as it can be."
Featured Image Credit: Martyn Wheatley/i-Images