Also, that single dashed line at a t-junction turning from a major into a minor road has the same meaning as on a dual carriage way or motorway where it delinea

Also, that single dashed line at a t-junction turning from a major into a minor road has the same meaning as on a dual carriage way or motorway where it delineates lanes - if there's something next to you, you have to give way/priority to whatever is the other side of that line, else you'll hit it, i.e. another vehicle. In this case, that's a pedestrian.