THE OFFICIAL HIGHWAY CODE

Highway Code

Signals to other road users

Signals to other road users

Signals used to other road users, including direction indicator signals, brake light signals, reversing light signals and arm signals.

Direction indicator signals

direction indicator signals right

I intend to move out to the right or turn right

direction indicator signals left

I intend to move in to the left or turn left or stop on the left

These signals should not be used except for the purpose described.

Brake light signals

brake light signals

I am applying the brakes

This signal should not be used except for the purpose described.

Reversing light signals

reverse light signals

I intend to reverse

This signal should not be used except for the purpose described.

Arm signals

For use when direction indicator signals are not used, or when necessary to reinforce direction indicator signals and stop lights. Also for use by pedal cyclists and those in charge of horses.

car arm signal turn left

I intend to move in to the left or turn left

car arm signal turn right

I intend to move out to the right or turn right

car arm signal slow stop

I intend to slow down or stop

bike arm signal turn left

I intend to move in to the left or turn left

bike arm signal turn right

I intend to move out to the right or turn right

bike arm signal slow stop

I intend to slow down or stop

These signals should not be used except for the purpose described.

Source: https://www.gov.uk/guidance/the-highway-code