Yes: because the postcode is the most important detail no matter what line it is on.
RELAX on this and don't stress yourself!
Yes, people just put UK sometimes.
Yes, I think
I recently placed an order with a european company. But instead of giving my address as address,postcode,country - i used an autofill form and it made a mistake by giving - address,then just UK (not united kingdom) then the postcode underneath this. Do you think this will still make it thru to me?