All Blacks head coach Steve Hansen has admitted that his team had “given themselves an uppercut” with the security lapse that allowed a journalist to publish highly sensitive team-room revelations before its confrontation with England at Twickenham.

Furious at the disclosures, including a whiteboard message that declared: “We are the most dominant team in the history of the world,” Hansen said. “When there’s a breach like this it is disappointing. We have given ourselves an uppercut. It was our problem letting someone in there. Ultimately, we shouldn’t have done that. But we can’t change it.”

Hansen also indicated that he would be reviewing New Zealand’s security protocols after the incident at their base at Kensington’s Royal Garden Hotel, where they had mistakenly left the double door to the Lancaster Suite wide open before a meeting, exposing their motivational mantras.