On 19 October 2010, Aziyan received his
diplomatic credentials as Brunei's high commissioner to the United Kingdom from
Sultan Hassanal Bolkiah at
Istana Nurul Iman. A month later, on 18 November, he accompanied the then
minister of development,
Suyoi Osman, on a visit to
Poundbury in
Dorset. Subsequently, on 10 December, he was received in audience by
Queen Elizabeth II at
Buckingham Palace, where he formally presented the
letters of recall of his predecessor,
Pengiran Maidin, along with his own letters of commission as Brunei's high commissioner in
London. In an interview with on 26 April 2011, Aziyan shared that around 2,000 Bruneians residing in the United Kingdom and Ireland were expected to attend a with the sultan on 1 May at the
Hilton Park Lane Hotel in London. Just over a month later, on 10 June, Aziyan was also present during the sultan's visit to the
Household Cavalry Mounted Regiment at
Hyde Park Barracks. During his tenure, Aziyan witnessed several key developments in
Brunei–United Kingdom relations. In 2012, Brunei contributed
£1,000,000 to the
Queen Elizabeth Diamond Jubilee Trust Fund, aimed at eliminating preventable cataracts and nurturing future leaders across the
Commonwealth. That same year, the Commonwealth Charter, which had been passed in December, was formally approved—marking a significant milestone in reinforcing shared values among
member states. On 11 March 2013, Aziyan received the Commonwealth Charter from
Commonwealth Secretary-General Kamalesh Sharma during the
Commonwealth Day Reception, underscoring Brunei's commitment to the values enshrined in the document. During his tenure, he also met with
Nikos Dendias to discuss strengthening bilateral relations, a shared commitment to international law and freedom of navigation, as well as Greece's candidacy for a seat on the
United Nations Security Council. with
Aminuddin Ihsan appointed as his successor. == Later life ==