Scotland (as part of Britain) is not metric as far as I know. The imperial measurement system was created by the British after all. The rest of the EU is metric, but not Britain.
There are a few exceptions in more human measurements - beer is measured in pints, burgers and steaks in ounces, distances on roads in miles and personal dimensions in feet and inches, barleycorns and stones.
Given that all official road signs for distances and speed limits in Britain are still in miles, I can't accept that it is a metric country.