I guess that it doesn’t help that the UK is an island. As you mention, Singapore and I’ll add to the list Japan.
We have also had the advantage of not being in the thick of the WWII. Huge advantages being separated from the action by a bunch of water.
What are its major industries? Bet that there aren’t any natural resources such as fossil fuels. Well there might be coal. There simply isn’t enough land mass.
Either way, I hope that the US see the value of helping a important ally with a common history and language.
The USA will prop it up, but like New York state can’t thrive cut off from the rest of the USA, even if it got super deals with China and Russia, in the same way, England Wales would need its hinterland