People in Sri Lanka are not the ones exchanging personal messages via AM radio broadcasts. Much of this article is about the province of Chubut https://en.wikipedia.org/wiki/Chubut_Province which has a population density of 2.6 people per square kilometer. The UK https://en.wikipedia.org/wiki/United_Kingdom has a population density of 287 people per square kilometer. Scotland https://en.wikipedia.org/wiki/Scotland has a population density of 71 people per square kilometer. The northernmost district of Scotland, Caithness https://en.wikipedia.org/wiki/Caithness has a population density of 41 people per square kilometer.

41 is not the same order of magnitude as 2.6.

In conclusion, from the perspective of the people this article is about, the UK is very small and densely populated.