I think all the countries observe Daylight Savings Time, so Portugal and the British Isles are currently on GMT + 1, and CET countries on GMT + 2. At the end of the month we'll go back to normal time, ie GMT for Portugal and British Isles, GMT + 1 for CET zone.
If that is hopelessly not clear, you should see some of the historical digging DoDo and I did once on the history of all that. No, you shouldn't see...
http://www.timeanddate.com/worldclock/ "Pretending that you already know the answer when you don't is not actually very helpful." ~Migeru.
Here's a map:
The green zone is CET.
