The long-running legal battle began more than four years ago when Harry challenged a government panel's decision to limit his access to publicly funded security.

The prince argues he and his family still needed an armed security detail because of hostility directed toward him and his wife Meghan, Duchess of Sussex, on social media and relentless hounding by the news media.

After stepping down as a working royal in 2020, the Harry was informed he would not be receiving the “same degree” of protection.

The Sussexes didn't keep any UK-based staff when they relocated to California in 2020, but in response to the level of interest in the couple in Britain their advisers have sought a PR team across the pond to keep on top of their messaging.