The waker uppers are up all night. Were there no alarm clocks at all? Can't a grandfather clock wake the waker upper?
> With the spread of electricity and affordable alarm clocks, however, knocking up had died out in most places by the 1940s and 1950s.
> Yet it still continued in some pockets of industrial England until the early 1970s, immortalised in songs by the likes of folk singer-song writer Mike Canavan.
The reason for that isn't clear.