Bandar Seri Begawan hosts Britain's High Commission to Brunei where oil wealth funds one of world's wealthiest sultanates maintaining close Commonwealth ties and British connections. The mission supports British businesses engaged in Brunei's dominant oil and gas sector including Shell's historic operations dating to colonial era, facilitates UK companies providing services to Brunei's petroleum industry, and assists British firms in construction, education, and financial services. British military maintains Gurkha garrison in Brunei under defense cooperation agreement, while Royal Brunei Armed Forces train with British forces. British tourists remain relatively rare given Brunei's strict Islamic laws including alcohol prohibition and conservative social codes, though visitors discover Omar Ali Saifuddien Mosque's golden splendor, water village communities living in stilt houses over Brunei River, and pristine rainforests in Ulu Temburong National Park. British expats work in Brunei's oil and gas sector, education institutions, and professional services, enjoying tax-free salaries and stable environment despite social restrictions. The High Commission provides consular services for British nationals, coordinates defense cooperation programs, and supports educational exchanges with British institutions. Staff process visa applications for Bruneian students heading to UK universities, facilitate business connections between British and Bruneian companies, and maintain diplomatic relations with Brunei's absolute monarchy where sultan serves as prime minister and finance minister.