There is no UK mission in Vatican. Please see
Established in 2002, Migration Expert is a private immigration company with a team of highly experienced migration consultants for Canada, the UK and Australia clients from across the globe wishing to apply for a UK visa. Migration Expert provides fee-based services in addition to the official government charges to advise, assist and represent our clients through the often-complex visa application process. All decisions for granting of a visa remain with the UK Government subject to lodging a valid application using the free forms available on the Government website and meeting the relevant criteria. Migration Expert is not affiliated with the UK Government and act independently in the interests of our clients.