Yes I agree QB1 about mirrors, when I did the actual commentary onboard I had to obviously do and say mirror check each time and point hazards out early etc. I thought I would just record a post commentary concentrating on road position. I also shoulder check a lot which some say is old Skool. But having spent the vast amount of my time in heavy commuter traffic near London there is so much lane swapping next to you you can't really rely on the mirror checks to the rear. I observed another tutor who swapped lanes on the approach to a congested three lane roundabout without a shoulder check, but if the car on the far lane had nipped into the middle lane as they did it could have been embarrassing. But I suppose we are not robots and can only do our best.