In United Kingdom you drive on the left side. Most cars have manual transmission (stick).
Unless otherwise posted, the speed limits for cars and motorcycles are as follows: 113 km/h (70 mph) on expressways, 113 km/h (70 mph) on motorways, 48 km/h (29 mph) in all built-up areas and 97 km/h (60 mph) on undivided highways.
Left turn on red lights is strictly forbidden unless an additional green semaphore arrow allows it.
It is illegal to drive with blood alcohol content higher than 0.08%.
Since both France and United Kingdom are part of the European Economic Area your driving license will be valid in United Kingdom without any additional documents required. If you do not have a new plastic, credit-sized driving license you can still use your existing license.
In order to rent a car: