In theory No - however in order to fly from any airport in the UK, including domestic flights you must have proper identification. For adults this can include Photo Card Driving Licences or government issued ID (e.g. Police Warrent Card, Military ID, etc). In practice, you'll find that although a passport isn't required (as your not leaving the country) most UK citzens will use their passport as government issued ID. Foreign visitors would be advised to have their passport just in case they didn't have other acceptable ID. I've just re-read the question and realised it refers specifically to children... as I don't have any I'm not sure! According to Easyjet children under 16 do not require photographic ID but they must be accompanied by an adult with the appropriate ID - individual airlines may have different rules though. Best to check!
Yes you need a valid passport to fly from Glasgow to Spain.
i believe you do.
A passport is still needed when traveling between the UK (Glasgow) and European Union Schengen countries (Berlin).
Yes, children need a passport to enter Canada.
Yes, children need a passport to travel to Mexico.
Your own nationality as well as where you are travelling from and to, will determine the need for a passport. However, it is always advisable to bring a passport when travelling internationally.
No - but some form of photo - ID is essential
Yes, even children need passport to travel. Especially when it is international.
That would depend on your nationality. As a general rule, for any international travel, bring a passport with you.
Yes, children need a passport to fly internationally.
Yes, children need a passport to fly to Mexico.
Yes, children need a passport to travel to Mexico.