He scored a try for Harlequins in their
11-9 victory against Exeter
on 31 December, but was arrested in the early hours of the following morning and found to have approximately twice the legal amount of alcohol in his system.
The scrum-half added: "I have decided not to contest the charge as I want to bring this to a close swiftly rather than have it hanging over my head for a year or more.
Jeremy GuscottEx-England and Lions star
“Lancaster has met Care and spoken to him, so he's found out the background and the reasoning for why Care did what he did. But there are two drink-related issues in close proximity and Lancaster has made up his mind that he is not going to accept off the field behaviour that is unbecoming of an England international. Banning Care from the Six Nations is a massive statement, telling players to tidy up their act. Lancaster has been completely decisive. No one is going to say it's the wrong decision - it's hard but fair ”
"I am devastated not to be selected for the Elite Player Squad for the Six Nations as I felt I had been playing near the top of my game with Quins.
"Quins and Stuart [Lancaster] have been very supportive and I totally accept their sanctions.
"I have made a couple of stupid decisions in the past weeks. I can only hope for the chance in the future to prove those decisions were the exception not the rule."
Harlequins director of rugby Conor O'Shea told BBC Radio 5 live: "I think Stuart has done the right thing and I support the RFU completely and entirely."
O'Shea said that Care's behaviour was "inexcusable" but added that Harlequins would support a player who he described as a "really, really good guy".
"He made a very, very bad decision and, on top of one a few weeks back, he's going to pay a very, very high penalty," O'Shea added.
"He has been tainted and brings that on himself. He's not trying to hide behind anything. He's fronted up very quickly."
Last month, Lancaster, who nurtured Care's development when in charge of the Leeds academy, was named
interim England coach
for the Six Nations, which begins on 4 February.
He replaced Martin Johnson, who stepped down following a disappointing World Cup which saw England eliminated at the quarter-final stage and beset by
a number of off-field controversies.
Asked if he was a disciplinarian when he took over, Lancaster said: "I am. I do believe that behaviour shapes performance and the environment. We want to make sure there are clear ground rules and clear non-negotiables."
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