You must use hand signals correctly – use the correct signal for the situation, and signal for 3 seconds. You don’t have to signal if it puts you at risk of losing control of your bike.
Hand signals let other people on the road know what you are doing. Use clear hand signals to help other people predict your movements and give you space.
This page describes how to:
There are three official hand signals.
You must use the correct hand signal for at least 3 seconds before:
Once you start your manoeuvre, you may need both hands on the handlebars. Signalling before you start is your best opportunity to show what you plan to do.
When turning, changing lanes or pulling out into traffic, you need to see if traffic is approaching from behind you.
If it is not safe, wait until there is a suitable gap.