When they launched their SussexRoyal website they claimed that as IPP they would always be entitled to that level of security. This claim was subsequently wiped from the site but not before some journalists had screenshotted it and reported on it.
I do believe they exited fully believing that their IPP status would never be taken away. I blame Harry for that - he only had to look at what happened to Beatrice and Eugenie - both non-serving royals who had their security taken away when they were 5th and 6th in line.
He was just one of eight grandchildren when he left - no more special in terms of security needs than the other six (apart from William).
I'd argue that he's potentially more eligible for security as the son of the monarch than before - but not at IPP level - the Queen's three spare children didn't get security like that when they are not performing official duties.
Now, as the Times first reported, some important language has disappeared from the "finances" section of Sussexroyal.com. Originally, the website explained that Meghan and Harry expected to retain their publicly-funded security, despite pursuing financial independence.
Read the original version below:
The provision of armed security by The Metropolitan Police is mandated by the Home Office, a ministerial department of Her Majesty’s Government, responsible for security and law & order. The Duke and Duchess of Sussex are classified as internationally protected people which mandates this level of security. As As stated on gov.uk, “No breakdown of security costs is available as disclosure of such information could compromise the integrity of these arrangements and affect the security of the individuals protected. It is long established policy not to comment upon the protective security arrangements and their related costs for members of the Royal Family or their residences.”
The updated text on the website now excludes this key claim: "The Duke and Duchess of Sussex are classified as internationally protected people which mandates this level of security."