Earlier quoted context omitted.
Better segregation of cyclists and pedestrians into their own spaces. The bell shouldn't be something that you use regularly.
Depending on how much traffic there is, combining them is fine.
I used to commute to work by bike in ~1M city in Europe, mostly on dedicated bike lanes, but some shared, and had just the smallest, barely audible bell, only because it was required by law. I don't remember using it much at all. I don't know what the problem is. Maybe the Londoners should take a good look at themselves.