It said market participants have formulated suggestions for a uniform increase or unification of the prices in the closed groups dealing with accommodation services on “the largest social media platform”, presumably Facebook.

As the match may attract 40,000-44,000 visitors, accommodation providers have suggested that the normal daily prices for this period be significantly increased to at least €100-120 for four people per night and €60-72 for two people in a room.

The GVH warned that such co-ordinated and controlled behaviour can be classified as price fixing, which is one of the most serious violations of competition law.