MARTIN JOHNSON warned England will be in “big trouble” if they fail to improve before New Zealand arrive at Twickenham for the final Investec Challenge clash of the autumn next Saturday.

England beat Argentina 16-9 on Saturday, but there was precious little for the 78,000 crowd to cheer – in fact they booed and jeered – and the only crumb of comfort for a frustrated Johnson was the result.

Usually that is all that matters but Johnson knows the battle-hardened All Blacks will punish England’s myriad of mistakes far more ruthlessly than an Argentina side who had only been together for six days.

Matt Banahan eventually scored the decisive try with 10 minutes remaining after England’s one quality attack in an otherwise turgid performance.

Johnson and his coaching team must somehow inspire a rapid transformation if England are to avoid another hammering from the All Blacks.

Twelve months ago New Zealand romped to a record 32-6 victory at Twickenham and Johnson said: “If the All Blacks are anything they are consistent in their performance and so we need to be a lot, lot better.

“If we make those same mistakes we will be in big trouble. It was a tough game to watch. It was frustrating for all of us. We have to get them back up for next week.

“Fear is always there, it is (about) what you turn that into and we need to turn that into a spirited display against the All Blacks. The guys need to trust themselves a lot more.

“You have to put a performance in to win the game.

“For all the things we didn’t do well against Argentina we ultimately won. I would take those mistakes with a win next week, but I don’t think that will happen.”

The predicted torrential rain held off but the wind whipped around Twickenham and England did not cope well in a disjointed first half.

Argentina peppered Ugo Monye with high balls and his inexperience as a stand-in full-back was cruelly exposed.

England went into the break at 9-9, with sections of the crowd booing them down the tunnel after an error-strewn first half and Johnson concerned his side were about to implode.

“Impatience and frustration could have really killed us at that point,” said Johnson.

“As a team we were clearly nervous and became more nervous as a few individual errors happened.”

“It was a long 80 minutes to watch, I have probably aged 20 years, but we won the game. If we had lost it would have been even worse.”

Jonny Wilkinson scored England’s first-half points with a drop-goal and two penalties but missed three second-half attempts and Argentina’s Martin Rodriguez was similarly wayward.

The scores were 9-9 until the 70th minute when England finally conjured their only five-pointer of the contest.