I've just heard that MI5 has started a new service offering to inform people by email of their latest thinking, changes to the level of terrorist threat and so on. Can you suggest a way of accessing the service anonymously? Name withheld
MI5 has launched a couple of mailing lists, and you can subscribe by entering a name and email address at https://www.mi5.gov.uk/output/Page575.html. The site says "You can register anonymously if you wish," and you can use a free web mailbox opened using spurious account details. However, if MI5 ever gets a clue, it will use RSS instead.