One thing that is confusing me slightly is the phrase "(1) This paragraph applies to a journey-
(a) to Great Britain from the Republic of Ireland, Northern Ireland or any of the Islands."
Which Islands are they talking about. Have I missed a definition somewhere?
Found it!
Section 121 Terrorism Act 2000
121. In this Act-
[...]
"the Islands" means the Channel Islands and the Isle of Man,
I hope that helps!
dp