[np-]

If your vehicle is ever fully stopped past the line, and the light is red, that would be considered a “blocking the box” traffic violation in most jurisdictions. You technically should not have entered the intersection at all without the ability to fully clear it.

[bloak]

In England, I thought it was only the "crossed out" intersections that you shouldn't enter unless the exit is clear. Rule 174 here: https://www.gov.uk/guidance/the-highway-code/using-the-road-...