There is a low threat from terrorism. See Terrorism.
The European Health Insurance Card (EHIC) is not valid in San Marino.
Take out comprehensive travel and medical insurance before you travel.
Around 6,000 British nationals visited San Marino in 2010 (source: San Marino State Tourism Office). Most visits are trouble-free.
The emergency services numbers in San Marino are: 112/113 (emergency service, gendarmerie), 115 (public safety, fire department, local police), 118 (emergency ambulance and medical services).
There is no British Consulate in San Marino. The closest British diplomatic mission is in Rome.