Prince Harry is to keep his tri-service military ranks when he and wife Meghan begin their new life away from the royal family on 31 March.
In June 2018, Prince Harry received promotions in all three services, becoming Lieutenant Commander in the Royal Navy, Major in the British Army, and Squadron Leader in the Royal Air Force - ranks he will retain in his new life.
A number of royal engagements have also been announced, including an Invictus Games event where Harry is to join up with pop star Jon Bon Jovi on 28 February.
Harry and Meghan are to join spectators at the games, in The Hague, the Netherlands, in May.
The couple will officially step back from being working members of the Royal Family on 31 March, no longer using their HRH titles, with the arrangement being reviewed after 12 months.
The Duke and Duchess are due to attend the Commonwealth Day service at Westminster Abbey on 9 March - it is believed it will likely be their final official appearance as working members of the monarchy.
He will also lose being Honorary Air Commandant of RAF Honington and Commodore-in-Chief of Small Ships and Diving, Royal Naval Command.
In January, the Duke said he and his wife were standing down from the Royal Family with "great sadness", but there was "no other option".
A spokesperson for the Sussexes confirmed details of their new non-profit organisation will be announced later in the year.
It was also confirmed the couple would continue to be known as the Duke and Duchess of Sussex, as well as by their titles of the Earl and Countess of Dumbarton and the Baron and Baroness of Kilkeel.
Prince Harry and Meghan will continue work with their existing patronages.
Furthermore, Prince Harry is to remain sixth in line to the throne, and the Sussexes retain their position in the order of precedence, the spokesperson added.
However, it is understood their use of the word 'royal', as in their "Sussex Royal" branding, is being reviewed.
Cover image: PA.