Admittedly I don't know the provenance of the site, but for any still doubtful of links between Gov and media, and who can't believe that any such co-operation would ever on purpose stoke fear, this SAGE doc is helpful.
evidencenotfear.com/how-sage-and-uk-medi...-the-british-public/
Appendix B option 2 is my favourite: "Use media to increase sense of personal threat".