For instance, even if a medicine is made in the UK, are its precursor ingredients imported? (Quite likely: yes.)
These things never mattered much before (except perhaps to wring our hands about the amount of fossil fuels being burnt to get stuff here.)
So take an interest. Peer at the labels of products in your kitchen, or down the shops. Learn just how much we depend on "everywhere else".
But don't just sit there like a lemon (imported - sorry) while the systems we take for granted get ripped up.