UK Government: Operation Yellowhammer Summary [pdf]
assets.publishing.service.gov.uk
assets.publishing.service.gov.uk
I suppose one could work out what is missing from the list and deduce what Number 15 is about and why it’s so sensitive; or just look up the previously leaked document.
https://www.theguardian.com/politics/blog/live/2019/sep/11/b...
"15. Facing EU tariffs makes petrol exports to the EU uncompetitive. Industry had plans to mitigate the impact on refinery margins and profitability but UK Government policy to set petrol import tariffs at 0% inadvertently undermines these plans." [More to come]