What should I pay attention to when driving in the UK in terms of traffic rules ?

Pay attention to the speed limit. In towns, it's 20, 30, and 40. Where there are no signs, the speed limit for two-lane roads in both directions is 60, and the speed limit for four-lane roads in both directions is 70. Also, when entering a roundabout, make sure to yield to other vehicles. Wait for the vehicles to pass before entering the roundabout. Remember to do this. I came across a traffic accident on the road. A small car was hit directly and knocked out of the roundabout without yielding.