News in the middle of a movie?

British television has some very annoying habits. We won't go into the running of their best programming on Friday and Saturday nights, and their worst on Sundays. Or the fact they can't seem to start a movie at a reasonable hour.

What's more annoying is that whenever they run movies, they seem impelled to stop it halfway through for a news break. Why?

In the past it's just been ITV who did this. Considering there's now an entire channel devoted to ITV's news, why do they feel the the to destroy the flow of their movies? But just now, watching a really crappy film on BBC3, they did it too. So WTF is the point of BBC News 24 then?

Can't we just have a movie run all the way through?