Not if the journey starts in the UK, however if you are flying be aware of the following:
British and Irish citizens (but not British "nationals" from Hong Kong or other places overseas) can fly within the British Isles with a photocard driving licence.
Other EU citizens can use their national ID card.
Everyone else still needs a passport.
i believe you do.
No, you do not need a visa.
Yes you need a valid passport to fly from Glasgow to Spain.
only if you are going to Northern Ireland, you need a passport to travel between England and Ireland.
Yes you would need a passport. You would also need a visa.
He/She will need an ID of some sort, but not specifically a passport.
Of course you do. If you are going overseas or in another country you need a passport or you will be put into immigration
A passport is still needed when traveling between the UK (Glasgow) and European Union Schengen countries (Berlin).
Yes, you need a passport to travel to Europe.
Yes, you need a passport to travel to Paris.
You need a passport
No, you do not need a passport to travel to Arizona if you are a U.S. citizen.