Citizens of the EU, Monaco, Andorra, Switzerland and Liechtenstein only need a National Identity Document (DNI) or passport to travel to the United Kingdom. For visitors from outside the EU, it is very important to ensure that the passport is valid for a minimum of six months from the date of arrival. You have all the information in: «Tips, documentation and requirements to travel to London«.
You have all the information in: "Tips, documentation and requirements to travel to London".