Billy Twelvetrees must take centre stage for England on Saturday

Billy Twelvetrees has been urged to "nail down" a Six Nations starting spot by taking centre stage for England on Saturday.After omission from the slender defeats to New Zealand and South Africa, the Gloucester captain will make his first start of the autumn against Australia at Twickenham.Twelvetrees has been restored to the starting xv after impressing in a 16-minute cameo against Samoa and rediscovering his consistency in training.He will line-up alongside Brad Barritt in the fifth midfield..., Billy Twelvetrees must take centre stage for England on Saturday