The next signal after a steady red traffic light is red and amber together (both lights lit at the same time) in the standard UK traffic light sequence.

Quick Scoop: What comes after red?

In the normal UK sequence, traffic lights follow this order:

  1. Red – Stop and wait.
  2. Red and amber together – Get ready to move, but do not go yet.
  3. Green – Go if it’s safe.
  4. Amber – Stop if you can do so safely, then back to red.

So if you’re approaching and the red light is showing, the next signal to appear will be red and amber together.

Typical theory test answer to
“You’re approaching traffic lights and the red light is showing.
What signal will show next?”
→ Red and amber.

TL;DR: The next signal after a red traffic light (in the UK) is red and amber together , not green.

Information gathered from public forums or data available on the internet and portrayed here.