Scotland head coach Gregor Townsend has fired a warning shot the direction of his opposite number, Eddie Jones, ahead of this weekend's Calcutta Cup Clash.
Townsend has fired a warning shot the way of Eddie Jones and England, questioning the legality in which they execute their defensive line speed.
The Scotland head coach is set to meet with Saturday's referee Nigel Owens on Friday and is expected to highlight the issue.
Townsend commented: "It's defiantly something we've highlighted to our players, it will be interesting to see whether they [England] stay onside. We watched the game last year and we've watched their games over the last weeks and to generate that line speed, especially off first phase, you have to make sure you stay ten meters back off line-outs before the ball is delivered and you don't get beyond the back foot of the ruck in phase play"
"If they are able to do that and still generate line speed, then we have to deal with that with the way we structure their attack. You'd need to look at their last few games to see whether they do come offside. That's down to the refereeing team to see if it does happen.
We'll meet [the officials] on Friday, so we'll see what we're going to talk about over the next few days."
Jones is likely to wave the issue aside with his usual media savvy methods, whether he will choose to return in equal measure is yet to be seen, but the Australian is early far from the headlines with a comment or two.
When Townsend was questioned over concerns over public criticism of fly-half Finn Russell, as happened with Welsh ten Rhys Patchell, Townsend brushed off the possibility.
"No, it is not something we have talked about"
After removing Russell from the field in the 64th minute of Scotland's victory over France and shifting scrum-half Greg Laidlaw to fly-half, Townsend further backed Russell, quelling any suggestions of doubt in his selection again this week.
"There was no doubt that Finn would start, he is our attack leader and an outstanding stand-off. Finn was very good in the second half [against France]. I believe is Finn had stayed on the field, we would have won the game and potentially had a couple of more tries."