The UK, US and Australia will work together “keeping our oceans free” with a new generation of nuclear-powered attack submarines, the three nations have announced, in what was perceived as an effort to counter China's maritime power. 

The pact will allow Australia to build nuclear-powered submarines for the first time, using technology provided by the US and designs by British experts.

As part of the agreement, the UK will also build next-generation submarines, which are expected to be in operation for the Royal Navy by the late 2030s. The boats will replace the UK’s seven Astute-class subs, although the government has not specified how many will be ordered.  

The submarines have been described as the "largest, most advanced and most powerful attack submarines ever operated by the Royal Navy" and are said to be able to stay submerged for months, shoot missiles longer distances and also carry more.

The AUKUS alliance was first announced in...