A British warship is to sail through waters disputed by China next month, Defence Secretary Gavin Williamson has said.
HMS Sutherland, a Type 23 frigate, will travel through the South China Sea on the way back from a deployment to the Pacific, he told The Australian newspaper.
The international waterway is at the centre of an international row between China, which has made territorial claims on islands in the area, and other nearby nations.
US warships have previously drawn protests from Beijing by travelling within the 12-mile Chinese territorial waters around the islands.
Mr Williamson told The Australian that Britain "support(s) the US approach on this".
"She'll (Sutherland) be sailing through the South China Sea and making it clear our navy has a right to do that."
Sutherland and her fellow Type 23 HMS Argyll are heading to the Pacific "to continue the pressure campaign on North Korea", the Ministry of Defence said.
Mr Williamson met Australian counterpart Marise Payne and defence industry minister Christopher Pyne to discuss post-Brexit defence business opportunities, including the Type 26 Global Combat Ship, the successor to the Type 23, which has been shortlisted for the Australian government's Future Frigate Programme.
Mr Williamson also told the newspaper that US requests for allies "to do more" were "a great opportunity for the UK and Australia to do more, to exercise leadership".
"The U.S. is looking for other countries to do more. This is a great opportunity for the U.K. and Australia to do more, to exercise leadership."
Chinese foreign ministry spokesman Geng Shuang told the Associated Press on Tuesday:
"Thanks to the concerted efforts by China and littoral countries in the South China Sea, there is no problem with freedom of navigation and overflight in the South China Sea at all."