England coach Eddie Jones accused Italy of playing "Trevor Chappell" rugby after the Azzurri threatened a huge upset in Sunday's Six Nations clash at Twickenham.

Jones's men eventually won 36-15 but only after turning round 5-10 behind at half-time, with Italy wing Giovanbattista Venditti scoring a try on the stroke of half-time after Tommaso Allan's penalty attempt came back off the post.

That capped a remarkable opening period where Italy frustrated England by standing off the ruck and defending in numbers.

England were convinced that the delivery of scrum-half Danny Care's pass was being repeatedly interfered with by Italy players who were in an offside position, but French referee Romain Poite allowed the tactic.

Tournament leaders England eventually regained their composure to score five second-half tries through Care, Elliot Daly, Jack Nowell (two) and Ben Te'o as they stayed on course for back-to-back Grand Slams.

But afterwards cricket fan Jones compared Italy's approach to the infamous 'underarm' climax of an Australia-New Zealand one-day international in 1981.

With New Zealand needing six off the last ball to tie the match in Melbourne, Australia captain Greg Chappell instructed brother Trevor to roll the ball along the pitch.

That made it impossible for tailend batsman Brian McKechnie -- also an New Zealand rugby international -- to hit a six.

Australia's tactics were within the rules as they stood, although these were subsequently altered to prevent all underarm bowling in future one-day internationals.

"Remember Trevor Chappell?," said Jones. "Bowled under arm along the ground. Couldn't hit the ball for six. We saw a Trevor Chappell game of rugby today."

The Australian added: "Congratulations to Italy. I thought they were brilliant in the execution, but if that's rugby, I'm going to retire. That's not rugby.

"If your half-back (scrum-half) can't pass the ball, then there's something wrong with the game.

"If you paid for your ticket, ask for your money back. I'll have to give my money back to Ian Ritchie (the chief executive of England's Rugby Football Union), because no-one's had rugby yet."