To be fair this might not be obvious, if you missed the context of the thread and unless you are familiar with "Southern Railways".
Under what circumstances do most people only have a choice of two.
DSL is broadband. I've been using DSL for over 17 years (and, while away from home, using combinations of cable & satellite), and I watch plenty of TV & listen to plenty of music on it. It really does work great for me.
I don't know about the rest of the UK but I don't think that is the case in Scotland - once you are any distance from a city or town the speeds can drop dramatically and that's not even in the Highlands or Islands. Certainly when we were looking at houses about a year ago there were quite upmarket new houses in Perthshire that had no broadband at all.