Tailgating occurs when other vehicles approach your rear bumper too closely.

Tailgating is dangerous, intimidating, and can cause collisions, especially when driving at high speeds,’ according to the Highway Code.
Maintaining a safe distance from the vehicle in front of you gives you time to react and, if necessary, stop.
Many modern cars have collision warning systems that alert drivers if they get too close to the vehicle in front of them. Make use of them, but don’t rely on them.
It is always preferable to follow the rules rather than push the limits of your vehicle’s technology.

What should you do if someone is tailgating you?
-Slow down by gradually releasing the accelerator and increasing the distance between you and the vehicle in front.
This will give you more time to react if something ahead slows or stops you.
-If you need to find a safe place to rest, don’t be afraid to do so.
-Don’t increase your speed because it may cause you to exceed the speed limit and leave you unable to stop if necessary.
-Make sure you signal in plenty of time so the vehicle behind you – and other road users – understand what you’re doing.