On , I learnt ...

BBC Sounds only works on Alexa if the language setting is UK English

Was puzzled as to why:

Alexa, play BBC radio four

wasn’t triggering the BBC Sounds skill on a new 4th Generation Echo.

Turns out the problem was the default language was “English (US)” when it should have been “English (UK)”.

This is noted in the BBC docs.

BBC Sounds on Alexa