6. Drive on the left
Personally, I would not advice for you to drive in London because the transport system is sufficient enough to visit the top attractions.
But, should you want to drive to visit the outskirts of the city or avoid the rush hour in the tube or bus, you can navigate the streets with a little insider knowledge: they drive on the left. Not only that, they use roundabouts where traffic continually flows around a center island.
You won’t run into trouble as long as you remember that traffic in roundabouts always has the right-of-way, while entering vehicles yield.