Rather than look for union with a devastated continent, Britain’s destiny lay West, in a special relationship with the United States.This seems obvious to us now, but at the time it was anything but.
It's worth noting the historical context here. After WW1, the US and Britian were seen as rivals, and there was a naval arms between the two. It's unfortunate that there isn't a lot of history written about this, but you can see the shadows of it in things that don't make sense otherwise.
For example, the Wikipedia page for 1922 Washington Naval Treaty[1] says:
The risk of war with the United States was increasingly regarded as merely theoretical, as there were very few policy differences between the two Anglophone powers, and as late as 1929 Foreign Affairs was still writing articles like The Threat of Anglo-American Naval Rivalry.
But of course nothing came of this rivalry. In the 1920s and '30s Britian and the US were the two great economic and military powers, but there was nothing for them to fight over (except perhaps the Anglo-Japanese alliance[3], but the British gave that up pretty easily)
[1] https://en.wikipedia.org/wiki/Washington_Naval_Treaty#Capita...
[2] https://www.foreignaffairs.com/articles/united-states/1929-0...
[3] https://en.wikipedia.org/wiki/Anglo-Japanese_Alliance