It'll come right. Every time Britain has been written off we've always come back.
Napoleon dismissed England as a "nation of shopkeepers". Hitler dissed us and bombed London, thinking our will was broken that easily. People were snickering at Britain as being the "Sick Man of Europe" in the 1970's with the unions leaving the dead unburied.
But guess what, Napoleon was defeated at Waterloo, Hitler had his head handed back to him during the Battle of Britain and El Alamein, and we elected Margaret Thatcher. Hand wringing and writing obituaries is all well and good for a nation with a history of less resilence. It doesn't work in this case.
Regards, Ivan