I have known things which were definite evidence of this (Monkey was retconned into our childhoods somewhere in the late nineties) but would dispute those two examples. The people who aren't dead when you think are just a function of how hard it is to believe that something so thoroughly of an earlier era could survive into this one - it would be like keeping the same guest star for more episodes of a series than you'd think affordable given their minimal use. Except, the universe has a very big budget.

And London streets, in some areas at least, simply wander. They don't need the world to change to let them move around, any more than the city's other wild animals do.