So you've lived or worked in south London for years and you know all the short cuts, all the best cafes and know which pubs to avoid on a Friday night.
But how much do you really know about the area?
Take this quiz - which will really sort out the tour guides from the tourists.
The questions are taken from London Quiz - How Well Do You Know London? which offers 400 provocative, curious and humorous questions about the capital. It was produced by website editor Travis Elborough and writer Nick Rennison.
The book launches today (June 5), published by Frances Lincoln, and is available from online retailers and bookshops in paperback.
Disclaimer: It's only a bit of fun but you are invited to use the comment box to boast about your score...