BRITAIN'S next prime minister is set to be a woman, after Theresa May and Andrea Leadsom took the top two slots in a crucial vote of Conservative MPs.

Justice Secretary Michael Gove was eliminated from the contest to succeed David Cameron as Tory leader, taking just 46 votes in the second-round ballot at Westminster.

Home Secretary Mrs May remains in pole position with 199 votes - well over half of the 330 Conservative MPs - with energy minister Mrs Leadsom on 84.

But the final decision on which of them will become the UK's second female prime minister, after Margaret Thatcher, will be made by Conservative Party members in a postal ballot due to end on September 9.