I am due to fly to portugal on the 26th of July and my passport is well in date and I have 6 months on returning although when I got my passport I was only 16-17 I am now 20 do I need to get a adult passport or is this one okay to travel on.

Passport is valid for l0 years, so you are well within the perimeters. No, you don't have to get an adult passport yet. That will happen when you renew after a full ten years.

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