The UK government's vast security operation to manage the immediate aftermath of the death of the Queen include official social media blackouts and a ban on retweets.

These plans, codenamed Operation London Bridge, which were first revealed in a Guardian Long Read in 2017 and have now been seen in full by Politico, detail the scale of the arrangements for the funeral and government anxieties about whether the UK has the resources to execute them.

The social media strategy plays a prominent role, including plans to change the royal family's website to a black holding page with a short statement confirming the Queen's death, while the gov.uk website and all governmental social media pages will display a black banner. Non-urgent content will not be published and retweets will be banned unless cleared by the government's head of communications.