London is a megacity of England/United Kingdom and even the world. It surrounds the main governing authority of the UK, being Buckhingham Palace. This is also what this wiki is about.
The current capital of the United Kingdom: formerly a county in its own right (1889-1965).
The geographical area covered is roughly the M25/the extent of the London Transport network.
Somewhat more flexibility with regards to original research and types of article allowed - for example walks - than with Wikipedia.