Leinster's crucial Heineken Cup clash with London Irish on 23 January has been moved from the Madjeski Stadium to Twickenham.
London Irish are tenants of the Madjeski and officials were forced to make the change as football club Reading may need to play an FA Cup tie that weekend.
The match will kick-off at 6pm.
Meanwhile, the Leinster squad to face the Glasgow Warriors in Friday night's Magners League clash at the RDS (KO: 8pm) has been named.
Jonathan Sexton has recovered from injury to take his place in the extended panel alongside wing forward Shane Jennings - who will captain the side - for the visit of the league leaders to the RDS.
The St. Mary's College duo join eleven other Ireland internationals - including the likes of Jamie Heaslip, Rob Kearney and Brian O'Driscoll - while there are also ten recent graduates from the Leinster Academy in the squad.
The likes of Nathan Hines, Isa Nacewa and Stan Wright are also in contention for selection and the team is expected to be named on Thursday lunchtime.
Leinster squad v Glasgow Warriors in the Magners League at the RDS on Friday, 8 January, kick-off 8pm.
FORWARDS: John Fogarty, Cian Healy, Jamie Heaslip, Nathan Hines, Trevor Hogan, Bernard Jackman, Shane Jennings, Stephen Keogh, Ronan McCormack, Kevin McLaughlin, Sean O'Brien, Malcolm O'Kelly, Mike Ross, Richardt Strauss, Devin Toner, Stan Wright
BACKS: Shaun Berne, Girvan Dempsey, David Kearney, Rob Kearney, Simon Keogh, Fergus McFadden, Isa Nacewa, Paul O'Donohoe, Brian O'Driscoll, Eoin Reddan, Jonathan Sexton
