Yeah take the course mate, you'd be in the wrong for not noticing the line markers changing as I think I remember they'd changed from a previous post you'd made?
Not good but take the course and at least then it's done with, you don't want to be in a situation where they can make an example of you as that could get expensive and much worse, a mate of mine was in a similar situation and got given a two year ban for something trivial but the judge decided to make an example!