What is the appropriate protocol for using the door open button on London trains and tubes?

When traveling on London trains and tubes, it's important to know the appropriate protocol for using the door open button. The door open button should only be used in emergencies, such as when someone is trapped in the doors or there is a fire or other safety hazard.

In all other situations, the doors will automatically open at the next station. You should wait for the train or tube to come to a complete stop before exiting, and then simply walk through the open doors. Trying to use the door open button when it's not necessary can cause delays and potentially put yourself and others at risk.

Additionally, it's important to remember that the door close button should never be used by passengers. The door close button is only used by the driver or conductor when it's safe to do so. Attempting to use the door close button can cause delays and potentially be dangerous.