Foreign Commonwealth & Development Office
Check the FCDO travel advice before traveling. It includes the advice for 226 territories and gives advice on entry requirements, security and safety, and any travel warnings.
Insurance claims that are made where the advice has not been followed can sometimes be declined.
Traveling to USA – Then you will probably need to apply for an ESTA – Electronic System for Travel Authorization. The fee is currently $21.00, but check the link for further information to check if you need it.