"The Cutty Wren", a traditional English folk song, is the "territorial song" (like national anthem for a British Overseas Territory?) of Tristan da Cunha, one of the remotest islands on earth with around 250 inhabitants.
Why is this? Was there a cultural connection between this particular song and the island or its settlers? I tried to search online, but only found the information that it is the territorial song there, nothing about why.