London is the capital of the UK. It is located in Europe.
The London Eye is in London, England which is part of the continent of Europe.
London is located in Europe.
By population or area? If population, and you are prepared to use Wikipedia as a source, which you probably shouldn't, London or Paris. This differs by your definition of city, and where you draw city limits.
London, England is in the continent of Europe.
London is located on the island of Great Britain, which is part of the United Kingdom of Great Britain and Northern Ireland, which is an an island located off of mainland Europe but it within the European Union.
There is no continent named London. London is the capital city of England, which is located in Europe.
London and Paris are both located in Europe.
London is the largest city in Western Europe and the second largest city in all of Europe.
London, England is in the continent of Europe.
The London Eye is in London, England which is part of the continent of Europe.
There are several cities by the name of London througout the world. If you are asking about London which is located in southeast England and is the capital of the United Kingdom - it is part of the continent of Europe.