abdg,
If you read the small print on your Permit to Fly, you will see that it "permits this aircraft to fly within United Kingdom airspace only..."
Many countries will still accept the aircraft and its (UK only) approved equipment in their airspace.
Just make sure you have all your UK papers in order.
Jan,
Thanks. I spent 7 years flying out of the only microlight field in Luxembourg, which meant every away landing involved crossing international borders. You need to learn the rules that apply in the different countries, or at least know where to find them - especially if you are going to break those rules.
PS. I also had my microlight based near Chartres for 3 years and tried to get DGAC approval for my UK purchased ICOM A21. Even though I had a letter from ICOM Japan certifying that it was exactly the same as the A21F, approval was not granted.