Police spotting (junction watch)

But in normal traffic conditions, you should be prepared to slow down or stop at any time due to unexpected situations. In the highway code, innit.

People running onto the road != normal traffic conditions.. or does it?

Normal traffic conditions is red man = don't walk so what happens when they do walk? Nothing? If so, what's the point of even having ped crossings and timed crossing signals? Traffic should be slowed to 10mph everywhere and pedestrians can step out without fear of being mowed down. But this isn't the case.