To stay in Latvia for more than 90 days, citizens of the United Kingdom should obtain residence permits.

To stay in Latvia for more than 90 days, holders of other travel documents issued in United Kingdom should apply for residence permits at any diplomatic or consular representation of Latvia abroad.

There are a number of countries whose citizens can enter Latvia without visa. Citizens of these countries can enter and stay in Latvia up to 90 days without visa.

In cases where a visa – free regime is applicable, as of 1 May 2003, a foreign national entering the Republic of Latvia at an official border crossing point will have to present a valid travel health insurance policy guaranteeing the coverage of costs associated with health care incurred within the Republic of Latvia, including those associated with transportation of the foreign national to his or her country of residence in the event of serious illness or death.

Here you can find more information on entry of citizens of the European Union and the European Economic Zone into Latvia.