Officially confirmed as joint hosts:
https://www.bbc.co.uk/sport/football/67062742
Also from the BBC:
https://www.bbc.co.uk/sport/live/football/67062519
"The FA wants England to reach Euro 2028 via the formal qualifying process, rather than be handed an automatic slot by Uefa, the BBC understands. This is because they think it would provide the team with better preparation for the tournament than a series of friendlies.
With five nations in the UK and Ireland bid - which will today be confirmed as unopposed hosts of the tournament at a Uefa ExCo meeting in Nyon, it is expected that Uefa will offer two ‘back-up’ berths for any host teams that fail to qualify on merit.
If more than two teams fail to qualify, it would mean the two teams with the best records would be handed those slots. It is therefore possible that as many as three teams from the UK and Ireland may not play in their own tournament if none reached the finals through qualifying."
That sounds blatantly unfair on countries other than the UK and Ireland.