Contact the U.K. Border Agency to locate your nearest embassy, consulate or VAC (Visa Application Center). Visas may be applied for online, by mail or in person. If not applying online, request the Family Visitor Application Form (VAF1B) to be sent to you and fill it out according to the VAF guidelines.
Follow the VAF guidelines regarding the passport photograph. Photographs must be 45 x 35mm, in color and taken against a light-gray or cream background. Applicants from specified African and Asian countries will have to provide a TB (tuberculosis) medical certificate, which can be obtained through medical centers.
Contact your nearest British embassy, consulate or VAC and make an appointment to process the passport and documentation. All visa applicants to the U.K. must have their fingerprints scanned at the processing center as well as having a digital photograph taken. Children under 5 are exempt.
Provide the immigration official with all necessary documentation and the visa processing fee. If the application is successful, the visa will be mailed out or available for pickup within two weeks.
