You don't need identification unless you plan to use a special railcard which gives you discount on a fare.
You need photographic ID for ANY flight!
It's much easier to take a train - and you won't need ID.
Of course. You will need a valid passport.
ID is very good - passports are not required
No, as both are part of the United Kingdom.
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.
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
Most airlines will not allow you to board an aircraft without an acceptable form of ID. A valid passport is the most acceptable form of ID. If you haven't got a passport, speak to the airline that you are planning to travel with and ask them what will be acceptable to them. Alternatively, go by train.
All flights require some form of photographic ID.
No, you do not need a passport just a form of photo ID.
yes he/she can