James Ryan predicts that the worst thing Ireland can do against England is go toe to toe at Twickenham.
They have done it before - even on Ryan's watch as captain in the Autumn Nations Cup two years ago in the absence of Johnny Sexton. It turned out badly that time.
Ireland haven't won at the venue since 2018 and Ryan, who is fit to play after missing the Italy win with an adductor injury, said: "Maybe we think too much about getting stuck in and maybe we let ourselves down a bit on other parts of the game, maybe the accuracy.
"A big thing is getting the balance right between the intent and the focus. We lacked a bit of focus at times against France.
"We were full of intent but it's just getting that balance right.
"Irish teams going to Twickenham, there would be an issue if you weren't full of intent - but we've got to make sure we've got that focus piece right as well so we can be accurate."
Ryan has only won once in three games at Twickenham, but it's a stadium he loves to play in - even if the 2020 Six Nations fixture was totally different, with no crowds present due to Covid.
"It’s a bit different to Stade de France but it’s brilliant," said the 26-year-old.
"Probably the big thing is when you get off the bus outside Twickenham and you walk 50 or 100 metres, it’s pretty cool because there’s thousands and thousands of people there.
“It’s a great stadium to play in, a good bit bigger than the Aviva. Someone mentioned there could be 25,000 Irish people there.
"Obviously there's so many Irish-English people so a lot of the people who would be going to it would be Irish anyway.
"I know, growing up watching Irish games at Twickenham, there’s always those little Irish pockets. Definitely we’d be conscious of that."
Ryan speaks of the influence of Paul O'Connell in targeting opponents in rucks and it is in that area, as well as at lineout, that the second row believes Ireland can set up a winning platform.
But it is something they went away from against France and it cost them.
"That's what we've spoken about, not assuming that just because our ruck has been good so far that it's just going to be good at the weekend," said Ryan.
"We've got to keep driving the things that we're good at.
"So definitely set-piece and ruck are huge for us going away from home and playing a big, physical English pack. That will be at the forefront of our minds."
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