Bit argumentative today. Expected to be completed in 2029. When first official moves to build a bridge in 2007 estimated cost was 5 billion euro now it's expected to be somewhere near to 7.5 billion and a tunnel. Delays have been due to trying to get two countries to work together, keeping the environmentalists happy, a battle with the eu over alleged illegal state funding among other usual stuff. Work finally started in 2021.
However anyone wishes to look at it they have run rings around our major infrastructure projects.
Wasn't intending to be argumentative, just pointing out that these things rarely ever go to plan and usually overrun significantly, both in time and money (though I agree it's likely they'll make a far better job of it than we would).