The UK and Ireland are now firm favourites to win the right to host Euro 2028 after UEFA confirmed Turkey and Italy had requested to merge their bids for Euro 2032.
Turkey have not withdrawn their bid to host Euro 2028, so remain a rival to the five-nation bid involving England, Northern Ireland, the Republic of Ireland, Scotland and Wales, but would not host back-to-back tournaments.
Turkey and Italy had been going head to head to host Euro 2032, but are now seeking to bid together.
UEFA said in a statement: "UEFA confirms that it has received today a request from the Italian Football Federation (FIGC) and the Turkish Football Federation (TFF) to merge their individual bids into one joint bid to host UEFA EURO 2032.
"UEFA will now work with FIGC and TFF to ensure that the documentation to be submitted for their joint bid is compliant with the bidding requirements."
UEFA is expected to make a decision on whether the joint bid is compliant well in advance of October 10, when the executive committee will decide who will host Euro 2028 and Euro 2032.
Ten stadia across the five nations would host matches if the Euro 2028 bid is successful - Wembley, Tottenham Hotspur Stadium, the Etihad Stadium, Everton's new Bramley-Moore Dock Stadium, Villa Park and St James' Park in England, a redeveloped Casement Park in Belfast, the Dublin Arena in the Republic of Ireland, Hampden Park in Scotland and the Cardiff National Stadium in Wales.
"Our pioneering five-way partnership will deliver a record-breaking and unforgettable UEFA Euro," Debbie Hewitt, chair of UK and Ireland bid, said in a statement when the final plan was submitted in April.
"We will work together tirelessly to be the best partners for UEFA and to deliver on every one of our shared priorities.
"We will focus on growing football, connecting with and engaging new fans, players and volunteers.
"We continue to invest £50million (57m euros) annually into grassroots football development across our five associations.
"Together, we want UEFA Euro 2028 to be the catalyst for a new and sustainable era for football, from the grassroots to the very top of the European game."
The bid has political support in all five nations too, with a joint statement on behalf of the nations' leaders in April saying they would be "honoured" to deliver the tournament.
