Which places are Crown dependencies?
The Channel Islands and the Isle of Man.
The Channel Islands and the Isle of Man are linked to the Crown but are not part of the UK. They run most of their own affairs, like small independent neighbours. Do not confuse them with real UK places such as Northern Ireland or the Isle of Wight - those are part of the UK.
Why it matters: The names sound British, so people put these islands inside the UK. They sit outside it.
Memory hook: Crown dependencies are 'close but not counted' - picture them standing just outside the UK's front door, loyal to the Crown but living in their own house.
Official handbook: Chapter 2, section 2.2, page 9