The late move of stadium for Leinster's final Heineken Cup group game means this match will have a different feel than it might have had in the Madejski Stadium. The larger venue will mean that Leinster supporters will need to work even harder to make noise and get behind the team.
This is a crucial tie, with a home quarter-final up for grabs for Leinster and qualification at stake for the home side, so rest assured that London Irish and their fans will be going all out to prove a point. Make no mistake, the level of Leinster support will be crucial.
If Leinster supporters need added motivation, just have a quick read of part of the London Irish message to their fans: "Having twice been victorious over Leinster already this season, in a pre-season friendly in Dublin in August and again at the RDS in Round 1 of the Heineken Cup in October, London Irish are fully primed to make it three in a row."
Michael Cheika has said he and the team want to deliver a home quarter-final to the supporters and will be doing everything in their power to achieve this.
The players have emphasised the psychological boost they get from hearing their supporters in full voice, especially on the road, so it is up to each and every blue-clad man, woman and child in Twickenham to give it their best shot throughout the match.
Get to the stadium early -- an hour before kick-off is ideal to be in time for the warm-up.
Twickenham can be cold and cavernous at reduced capacity. It will take a concerted effort from supporters to raise the roof -- so, in brief, be blue, be seen and give it socks!