Re: The main problem here..
"Last year, not half a mile from my front door, an elderly pedestrian was knocked down and killed by a cyclist on the pavement."
That's one too many. Where was it?
To put it into context as a pedestrian - which we all are - there was one pedestrian death involving a cycle on the pavement or verge, whereas altogether, 34 pedestrians were killed on average each year by vehicles on pavements/verges.
Which fits my experience around here where I'm much more likely to encounter a car on the pavement than a bike. And we have a lot more cyclists than any other city bar Oxford or Cambridge. Whereas campaigns to protect pedestrians on pavements always focus on cyclists and ignore the much greater danger. Facts don't seem to matter.