One of the many things I love about London is that you might have lived here all your life but there are always new nooks and crannies to discover. That is one of the reasons I love traveling around the capital on my bicycle. It allows you to weave your way through all the back streets and take it all in at your own pace.
The interesting thing about London of course is that due to the sporadic bombing that occurred during WWII much of the architecture you see throughout the city is very contrasting. You might find two entirely different architectural eras right next to each other, just as you will find a council estate right opposite some of the most sought after real estate.
Another endearing feature of some of London's best kept real estate secret are its lovely mews. You will find these hidden everywhere and you can run into some of the most fantastic mews anywhere in the city.
I can recommend hopping on a Boris (Santander) Bike and going out to discover all of London's secrets. Enjoy!