LIST: The World's Most Powerful Passports

Japan and Singapore remain top of a ranking of the world's most powerful passports, new global research has revealed.

Citizens of these nations can visit 189 countries around the world visa-free with the South Korean passport dropping to second place on 187 countries.

The UK passport has also moved down to joint sixth place in the list - one of its lowest ever spots since the ranking began 14 years ago - alongside the US passport as both allow visa-free access to 183 countries.