All I can say is that in spite of saving the world in 2 world wars, one of which she stood alone  ,  tiny UK has the 6th largest GNP in the world,  one of the highest living standards, a working democracy second to none, check out the US  and Turkey, a country  that millions of immigrants want to live in,  that has given to the world more than any other country - a universal language, railways ,   universal sports in soccer, golf and tennis,  just to name a very few.    And a flag that is the most recognized symbol in the world.   So after all that, as I say, the UK though she has been written off many times before will survive these relative  minor problems