England, Scotland, Wales and the Republic of Ireland have told Uefa they want to stage European Championship matches in 2020.
Uefa says 32 of its members have stated their interest in hosting games after deciding the tournament would be shared amongst 13 cities across Europe.
England wants to host games in London and Scotland has chosen Glasgow.
Wales has opted to go for games in Cardiff, while the Republic has picked Dublin as its venue.
The candidates have the right to change their initial host city selection, but must submit their final choices by 25 April next year.
Uefa will decide on 25 September 2014 which 13 cities will host games.
“We are extremely proud to see the huge interest in the bidding process, with more than half of our member associations willing to host matches at Euro 2020,” said Uefa president Michel Platini.
“The finals will be a great celebration of football across the European continent, and the 60th anniversary edition will be truly special, by really coming to the doorstep of all football fans.”
The 32 countries interested in hosting Euro 2020 games:
Armenia (Yerevan), Azerbaijan (Baku), Belarus (Minsk), Belgium (Brussels), Bulgaria (Sofia), Croatia (Zagreb), Czech Republic (Prague), Denmark (Copenhagen), England (London), Finland (Helsinki), France (Lyon), Macedonia (Skopje), Germany (Munich), Greece (Athens), Hungary (Budapest), Israel (Jerusalem), Italy (Rome and Milan), Kazakhstan (Astana), Netherlands (Amsterdam), Poland (Warsaw and Chorzow), Portugal (Lisbon and Porto), Republic of Ireland (Dublin), Romania (Bucharest), Russia (St Petersburg), Scotland (Glasgow), Serbia (Belgrade), Spain (Madrid, Barcelona, Bilbao and Valencia), Sweden (Solna), Switzerland (Basel), Turkey (Istanbul), Ukraine (Kyiv and Donetsk) and Wales (Cardiff).
More to follow.