"We usually talk either by text or by phone, probably every second week", said Hansen.
England coach Eddie Jones believes the introduction of a second referee could be rugby union's answer to dealing with the increasing intensity of the game.
"We've moved on a lot so apart from personal achievement I think it's hard for the group to take anything from it".
"So it probably indicates I like him and he might like me; I don't know".
Meanwhile New Zealand coach Steve Hansen refused to rise to the media's bait and stoke up the rivalry ahead of Saturday's much-anticipated clash - the first time England will play New Zealand in four years.
"The only people that don't understand what it's like to be a head coach of an global team are the people who've never been one".
England have additional insight into New Zealand through John Mitchell, the former All Blacks coach who is now Jones' assistant up to the end of the World Cup. It comes just in a different wrapper.
"When we were successful with the Wallabies we could beat them because we could get to their set-piece, particularly their line-out", he said.
A 360 degree bowling action!
From ambidextrous bowling to pausing in the middle of the bowling action, bowlers do unique things to get the better of the batsmen.
After England's 12-11 victory over South Africa, Jones, who led the team to 18 wins in a row when he took over but has seen the wheels come off the chariot since, told the assembled reporters: "We are a bloody good team and lost a few games but today we won".
"I just think the game is getting more intense". And he's still doing the same job.
"So no, I'm not going to give you reasons why we didn't pick him".
"He's got a tremendous work ethic, Eddie; he does a lot of homework and through that he will have identified some areas he'll want to try to target", Hansen said.
"Does it mean we've got to be on guard against England?"
New Zealand go into the game on the back of a 69-31 win over Japan in Tokyo last Saturday with a side featuring eight debutants.
Obviously if they're not quite on the money then we're going to have a plan and it does open up an opportunity if we're smart so we have to make sure we're all aligned.
"It's such a good team environment to walk into", he said.