Australian Prime Minister Tony Abbott could face a second challenge to his position this year after a senior minister called for a vote on his party leadership.

Australia’s incoming conservative government promised to reboot a stalled mining boom and revive an appetite for investment yesterday after leader Tony Abbott swept into office on a platform to scrap a mining tax and run a stable administration.

Australians go to the polls tonight in what is predicted to be one of the closest battles in decades and offering a stark choice between two very different leaders.