FWIW, when I walk up to a crossing, I look both ways, as one should, and if there’s any traffic I’ll press the button and wait, or if it’s a zebra crossing, I’ll stand and wait for cars to stop. I will walk across if I think a car is far enough away that I can walk safely without needing a red light, but as I can’t run, because of my shonky arthritic knee, a reasonable stroll is the best I can do.
It’s the peds who, when I’m driving towards them and they’re approaching a crossing, instead of walking up to it and waiting for me to stop walk up and step straight onto the crossing! This, I believe, is contrary to what the Highway Code says, that one should wait for approaching traffic to stop before putting a foot onto the crossing.