Some useful tips about car rentals in London
It can be confusing driving around the city because cars are on the left lane of the road and the driver is sitting at the right side of the car, also because of the complicated road grids in London. But this will only be difficult at first. Once you get the hang of it, you'll be driving like a Londoner. If you want to experience the city by driving, there are many car rentals in London. Usually, they have desks at the airport. 
