In general, it's interesting to see the differences between radio in Northern Europe vs. Southern Europe. In most Northern countries, FM broadcast allocation is much stricter, with state/public broadcasters having a dominant role and with few commercial stations, most of which operate at a fraction of the power that is allocated to the state/public broadcasters. This is true in the UK, Ireland, most Scandinavian countries, Germany, Austria, Switzerland, etc.
Moving down south, the radio dial begins to get more and more crammed and state/public broadcasters have far less of a dominant position compared to commercial broadcasters. And the further east you go, the more crammed the dial gets, starting from Portugal and Spain and France and heading to Italy, Greece and Turkey. In the latter three countries in particular, the FM dial is pretty much crammed with stations 0.2-0.3 MHz apart in most cities, all the way from 87.5 to 108.0 MHz. This is especially interesting considering that many of these countries did not even deregulate domestic broadcasting until the late 80s-early 90s, prior to which there was only state radio and perhaps a few pirate stations here and there (Italy, however, deregulated in 1976).
It actually wasn't too long ago that FM broadcasting past 100 MHz was prohibited in the UK, and the Eastern bloc countries (most of which have pretty lively FM dials nowadays, at least in the cities) only used the old Soviet 66-74 MHz FM band!
