Sorry if I've missed this. I just went onto maps and noticed the motorways in the UK are blue. They definitely haven't been like this the whole time on beta 3 as I was only using it yesterday and have some print screens of when they were still yellow. They are also still shaking as yellow on my iPhone. I'm running iOS 7 beta 3 on both devices. This is a good step and one that I know many people in the UK have been asking for!