When traveling to Bolivia, UK nationals must ensure they have necessary documents for immigration. Required items include a valid passport with at least six months of validity, and a visa if their stay exceeds 90 days. Additionally, it is crucial to provide accommodation details in advance through SIGEMIG. The system requires personal and lodging information, such as passport details, contact information, and travel dates. Upon completing registration, travelers will receive a SIGEMIG document, which they must present upon entry, either as a printed document or digital copy, although physical documents are preferred by Bolivian authorities.