Britain wants to expand its influence among countries in the Indo-Pacific region to try to moderate China's global dominance, a document laying out post-Brexit foreign policy priorities will say on Tuesday.

The document will also underline the importance of strong ties with the United States, and British media said an increase was planned to Britain's nuclear arsenal and that Russia would be named as a top security threat.

Britain's biggest foreign and defence policy review since the end of the Cold War will set out how Prime Minister Boris Johnson wants to be at the forefront of a reinvigorated, rules-based international order based on cooperation and free trade.

Calling the Indo-Pacific "increasingly the geopolitical centre of the world", the government highlighted a planned...