Always be in the left most lane in roadworks?

[willmagrath]

Hi all, I'm having an argument with my father.

While on the M1 yesterday, he was driving through one of these 50mph average speed sections, but stayed glued to the middle lane despite the lane 1 being clear. This annoyed a few lorries etc as he had the cruise dead on 50mph.

When I questioned this, he said the highway code says you shouldn't be changing lanes through roadworks. I disagree!

Who's right?!!