UnScramble this Word: u i n u t m o p l?

Questions

What country forms a 2000 mile archipelago along the east coast of Asia?

What underground line is Heathrow Airport on?

What islands got their name from the Spanish baja mar, meaning shallow water?

What London station would you take the train from to get to Gatwick?

What city's harbour does The Little Mermaid hail grace?