Incorrect!

Which lights should you use when you're driving in a tunnel?

Sidelights
You selected this answer
Front spotlights
Dipped headlights
Correct answer
Rear fog lights

DVSA theory test explanation

Before entering a tunnel, you should switch on your dipped headlights, as this will allow you to see and be seen. In many tunnels, it's a legal requirement. Do not wear sunglasses while you're driving in a tunnel.