It is recommended to regularly check UK Foreign Travel Advice for any destinations you are planning to travel to before you embark on your upcoming cruise.
UK Foreign Travel Advice
https://www.gov.uk/foreign-travel-advice
When searching for information by country, be sure to visit government websites to avoid paying unnecessary high fees for visas etc. You will typically see the word 'government' or 'gov' on the Home Page of official country websites.
For the latest travel advice from the Foreign & Commonwealth Office including security and local laws, plus passport and visa information, visit FCO Travel Aware website