(Left to right) Boris Johnson, Gisela Stuart and Andrea Leadsom take part in The Great Debate on the EU Referendum at Wembley in London on June 21, 2016.

British leadership contender Andrea Leadsom said the UK could pull out of the European Union as early as next year following last week's referendum vote to leave the bloc.

In an interview with the Sunday Telegraph, Leadsom said she had a fast-track policy for leaving and that only someone who had herself voted to leave the EU could be trusted to take the country out of Europe.