Incorrect!

What should you do if your vehicle breaks down in a tunnel?

Stay in your vehicle and wait for the police
Stand in the lane behind your vehicle to warn others
Stand in front of your vehicle to warn oncoming drivers
You selected this answer
Switch on hazard warning lights, then go and call for help
Correct answer

DVSA theory test explanation

A broken-down vehicle in a tunnel can cause serious congestion and danger to other road users. If your vehicle breaks down, get help without delay. Switch on your hazard warning lights, then go to an emergency telephone to call for help.