It's going to be noisy again
'The government stresses that emergency alerts should remain switched on, but has published a guide, external for domestic abuse victims on how to opt out.' - hmm it looks to me as that is effectively switching them off, and in the context of the article should read the phones remain switched on, but that is essentially meaningless contextually as well.
https://www.bbc.co.uk/news/articles/c4ge9xk8wj0o