Of course. You will need a valid passport.
You need photographic ID for ANY flight!
ID is very good - passports are not required
No, as both are part of the United Kingdom.
You will need a passport, visa, and American Visitor Insurance.
He/She will need an ID of some sort, but not specifically a passport.
this question doesn't make sense as Scotland is in the UK. If you mean "do you need a passport to travel between England and Scotland" then the answer is no. Unless you are flying, in which case you will need some form of photo ID such as a passport or driving license.
It's much easier to take a train - and you won't need ID.
Yes. I've never been asked for any form of ID travelling from NI to Scotland by ship. Its generally regarded as a domestic ferry trip. But if you are flying you need to check with your airline as to what form of ID they require. Ryanair etc require a passport for all of their passengers
All flights require some form of photographic ID.
No, you do not need a passport just a form of photo ID.
If you a British and not on an international carrier, you will need either a British passport or a valid 'picture' drivers licence. If you are not British, but from another European Union country, an ID card from your country will suffice. If you are neither British nor from and EU country, you will need your passport from your home country.
No