I 'think' i'm right in saying that this is not offside but instead leaving lineout before the ball is thrown, which is a free-kick. Happy to be corrected here...
7 and 3 might argue that they are simply changing positions in the LO, which would be a stretch based on this still photo, but the white scrumcap fella has definitely left the lineout.
On a slighly tangential note, given than games are not a better spectacle for the whole scrum>penalty>kick>lineout>drive>try procedure, I find it odd that the yop level should be so lax on this approach to the lineouts.
Can see it either way but clearly the action is occurring before the ball is thrown.
18.10 - Each team forms a single line parallel to and half a metre from the mark of touch on their side of the lineout between the five-metre and 15-metre lines. The gap between the lines must be
maintained until the ball is thrown in.
Sanction: Free-kick.
Does that therefore mean opening the gap is an offence?
Some will argue:
18.17 - Once the lineout is formed, players:
a. From the team throwing in may not leave the lineout other than to change positions with other participating players.
b. From the non-throwing team may leave the lineout only to ensure that they do not have more players than the opposition.
Sanction: Free-kick.
Changing positions? Fine margins!
Or does it come under:
Offside at a lineout
18-35. Players not participating in the lineout must remain at least 10 metres from the mark of touch on their own team’s side or behind the goal line if this is nearer. If the ball is thrown in before a player is onside, the player will not be liable to sanction if the player immediately retires to the onside position. The player cannot be put onside by the action of any other player.
On the Sale example to my mind, they have left the line out as they are not changing positions but setting themselves up for the driving maul. If they stepped out and then loitered without retiring then 18.35. Also Blue 8 is in the 5m channel so is not in the lineout, therefore should retire to 10m without further participation.
For the Quins try:
Again, changing positions? Fine margins!
If only they had spent time and effort over the summer getting a world class kicker