Would've conquered the rest of Northern Africa, but the very thought of the coring cost is completely unappealing. As for the tip of the UK, well, I conquered it in reverse (Scotland, then Ireland, then Wales and the Danelaw and Mercia), and just ran out of years to kill off the UK. And as for Italy, the last of it is held by Austria (my ally), France (my eternal PU) and Savoy (truce).
