No, they don't. People from most European countries just need their passport to enter Mexico.
American citizens don't require a visa to visit Mexico.
They don't. European citizens can enter and leave Mexico without additional requirements besides their passport.
Citizens from Trinidad & Tobago don't require a visa to visit Mexico. All they need is a valid passport.
Canadian, American and European citizens can enter Mexico without additional requirements other than their passports.
Yes they do ! Just the same as British people need a Passport to travel outside the UK - so do Irish people !
No.
no
no
No
British citizens who are in Chicago get married the same way as citizens. They need to go to the courthouse or religious figure and attain their marriage license. They will need to have valid IDs.
That depends on where you want to travel. British passport does not need a visa to visit the British Virgin Isles, or Canada, or the USA, or Mexico... and many other places. What country are you interested in? Answer that, and we might be able to help you with more details. Have fun! ;-)
No.