Why does the name of a feature not show on the map

Thanks for the answers. The map created by SomeoneElse is what I was looking for, for mapping walks from directions given by leaders which use these sort of features.
I am just getting used to the way that at different zoom levels the visibility of feature labels changes, it seems to be controlled by whether they overlap with neighbours, which make sense, but sometimes gives odd results, so the parking at Birchen Clough https://map.atownsend.org.uk/maps/map/map.html#zoom=15&lat=53.42983&lon=-1.8403 is visible at zoom 13 and zoom 18, but not in between. I understand that deciding what to show is a hard problem; I suppose ideally there would be user controls to set priorities for chosen features, or for what the tradeoff is between visibility and clarity.

it seems to be controlled by whether they overlap with neighbours

Yes, that's exactly it. In this case the name of the "place=locality" Birchen Clough Bridge is obscuring at at those zoom levels where it both is displayed and would overlap. Essentially with maps that have one fixed style you can't have "everything louder than everything else"; something has to take precedence. The alternative is to use a map that is created "on the fly" from the data (such as you'd see in the OsmAnd app on Android) - there you can to some extent turn on and off various features.