France handles all immigration and custom issues for Monaco, therefore all normal documentation requirements for entry into France applies for Monaco. A British Citizen or British Subject with Right of Abode in the UK will not need a visa to enter Monaco.
All British travelers will require a valid passport and although there is no minimum passport validity requirement set, it is recommended to check with carriers with regards to this matter. Other British passport holders are advised to contact the French Embassy or Consular office nearest them for up-to-date information for entry requirements into Monaco.
Those that live within the jurisdiction of the French Consulate in London:
French Embassy in London
French Consulate in London
21 Cromwell Road
Telephone: (020) 7073-1200
Fax: (020) 7073-1201
Email: firstname.lastname@example.org / email@example.com
Those residing in Scotland and Isle of Man must apply at:
French Consulate in Edinburgh
11 Randolph Crescent
Telephone: (131) 225-7954
Fax: (131) 225-8975