​His Majesty Sultan Haji Hassanal Bolkiah Mu'izzaddin Waddaulah ibni Al-Marhum Sultan Haji Omar 'Ali Saifuddien Sa'adul Khairi Waddien, Sultan and Yang Di-Pertuan of Brunei Darussalam has consented to send congratulatory messages to His Majesty King Charles the Third, King of the United Kingdom of Great Britain and Northern Ireland, and the Right Honourable Rishi Sunak MP, Prime Minister of the United Kingdom as well as members of the Royal Family, the Government and the people of the United Kingdom on the occasion of His Majesty King Charles the Third's 75th Birthday Anniversary.​