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English rugby bosses are looking at a ban on players having female guests in their rooms, following today's confirmed allegation of rape against at least one member of the England team.
The Guardian newspaper said the RFU is considering the introduction of the ban from next season.
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England rugby union say four of its players deny allegations of rape made against them.
It has also confirmed that they are refusing to speak to police and said this was on the basis that no formal complaint has yet been made by the alleged victim.
A statement issued late this morning said: "Those players have each received legal advice from lawyers engaged to independently consider their interests.
"In the absence of any formal complaint in this matter the players were advised to decline the request made to them to voluntarily attend upon the Police and they are fully within their rights to do so.
"The players continue to deny the allegations and have the full support of the England management, coaches and players."
Auckland City police also put out a statement this morning revealing that the players were refusing to answer questions.
The rugby union said there was a "positive dialogue" ongoing with the police.
The spokesman added: "The England squad fully understands the frustration felt by many members of the public and the media regarding the lack of information the squad have been able to provide. We hope it is understood that in the context of an on-going police investigation that this is a difficult time for all concerned and that when it is appropriate to do so further comment will be made."
Police confirmed this morning for the first time that the allegations are that a woman was raped and/or sexually assaulted by four players. No formal compliant has been made.
Auckland police flew to Christchurch yesterday in the hope of speaking with the four players alleged to be involved.
It is understood the 18-year-old woman's boyfriend contacted police after she returned from Auckland's Hilton Hotel, where an assault allegedly took place following a post-match drinking session in central Auckland on Saturday night.
Auckland City police communications manager Noreen Hegarty said the players had advised police via lawyers they declined to be interviewed at this stage.
Ms Hegarty said the investigation would continue as "thoroughly as possible" before police reviewed the file.
"Any decision about where to take matters from there will depend on the outcome of that review."
A formal complaint could be made at any time in the future.
The allegations have made headlines throughout British media, with concerns the sordid nature of the claims would ensure they overshadow anything that happens on the pitch during the team's two-match tour against the All Blacks.
A day after getting the full tabloid treatment in England's Sun newspaper, the more serious broadsheets the Times and the Daily Telegraph today both weighed in on the allegations.
The Daily Telegraph reported police were "increasingly frustrated" by what they saw as the England camp's hindering their access into the rape claims.
Officers had also hit back at perceived efforts to downplay the allegations.
The newspaper said the players were accompanied to the hotel by several young women, including the 18-year-old, who went back to the room of one of the players.
According to one report, she had consensual sex with the player before another squad member came in from an adjoining room.
Sources within English rugby have claimed the girl also had consensual sex with the second man, which was witnessed in part by two other players.
The teenager then returned home, where her boyfriend later contacted police and made an allegation of rape.
The men all maintain the sexual activity was consensual.
The newspaper said whatever the outcome of the inquiry, the sordid allegations marked a new low for English rugby.
It cited one police source as accusing the England management of "pushing agendas" by briefing newspapers that the sex was consensual even before detectives had a chance to speak to the players concerned.
"This is a very serious allegation indeed," the source said.
"Suffice to say that New Zealand police wouldn't be pursuing an inquiry of this kind if they did not believe that the alleged victims claims were sufficiently credible to require thorough investigation."
The Times said England had appointed one of New Zealand's leading barristers to defend the players should the alleged victim decide to make a formal complaint.
England captain Steve Borthwick has said it would be a "massive achievement" for his side to beat the All Blacks in the second test under the circumstances.
- NZPA
Video: England team keeping mum on allegations