In theory no, because both are within the United Kingdom. In practice, because of increased security in recent years, most airlines will not allow you to board an aircraft without an acceptable form of photo ID. A valid passport is the most acceptable form of ID. Check with the airline that you are intending to use before you buy a ticket.
He/She will need an ID of some sort, but not specifically a passport.
NO
yes
No.
You will not require a passport to travel from Sunderland, England to Falkirk, Scotland.
Of course. You will need a valid passport.
yes you do im Irish
No.
No, you do not need a visa.
No. You don't need a passport to travel from one part of the UK to another.
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.
only if you are going to Northern Ireland, you need a passport to travel between England and Ireland.