Eh? If they're behind you too close, how are you overtaking them?
Well it's pretty clear isn't it?
Driving in reverse

Jokes aside, all up in my chuff as in being annoying/driving without standards, being an eejit etc. Typically these are the people who will hesitate and brake and every single roundabout when it's totally clear or a big roundabout and a car is at 12 and tehy will wait and wait and wait for the car to pass. Hesitation joining junctions and zip merge are the biggest thing I see on a regular basis. It's like people don't really know what they or their cars are capable of and drive with 24/7 caution instead.