Dear sir or madam,
We would like to inform that from July 01st 2017 to June 30th 2018, Vietnam offers 15-day visa exemptions for visitors from the U.K.. However, their passports should have at least six months of validity upon the date of arrival, and their arrival date is NOT within 30 days from their last exit date with visa exemption. Otherwise, they will need a Vietnam visa. In this case, please apply for an evisa since you will travel by cruise. Please note that an evisa to Vietnam once issued is valid for 1 month with single entry.
For any further details, please contact us at email@example.com or call us at (+84) 909 343 525
Hannah Yan (Ms.)