Match officials to May 15
It's play-off season up north with semi-finals in the Aviva Premiership and the Magners League set to grip European club rugby this weekend.
It's play-off season up north with semi-finals in the Aviva Premiership and the Magners League while there's the usual Super Rugby action in the south.
Wayne Barnes takes charge of the defending English champions Leicester's clash with Heineken Cup finalists Northampton while George Clancy will ref the all-Irish Magners League showdown between Leinster and Ulster.
In Brisbane, Jonathan Kaplan will be the man in the middle for Super Rugby's top-of-the-table clash between the Reds and Blues.
Aviva Premiership semi-finals
Leicester Tigers v Northampton Saints at Welford Road
Referee: Wayne Barnes
Saracens v Gloucester at Vicarage Road
Referee: Andrew Small
Magners League semi-finals
Leinster v Ulster at RDS
Referee: George Clancy (Ireland)
Assistant referees: John Lacey (Ireland), Ollie Hodges (Ireland)
Television match officials: Dermot Moloney (Ireland)
Munster v Ospreys at Thomond Park
Referee: Nigel Owens (Wales)
Assistant referees: David Wilkinson (Ireland), Kevin Beggs (Ireland)
Television match officials: Peter Ferguson (Ireland)
Top 14 play-offs
Clermont v Biarritz at Stade Marcel Michelin
Referee: Jean Luc Rebollal
Castres v Montpellier at Stade Pierre-Antoine
Referee: Franck Maciello
Super Rugby
Highlanders v Hurricanes in Invercargill
Referee: Vinny Munro (New Zealand)
Assistant referees: Garratt Williamson (New Zealand), Keith Brown (New Zealand)
Television match official: Kane McBride (New Zealand)
Reds v Blues in Brisbane
Referee: Jonathan Kaplan (South Africa)
Assistant referees: Ian Smith (Australia), Damien Mitchelmore (Australia)
Television match official: Steve Lesczcynski (Australia)
Chiefs v Stormers in Hamilton
Referee: Stuart Dickinson (Australia)
Assistant referees: Glen Jackson (New Zealand), Nick Briant (New Zealand)
Television match official: Shane McDermott (New Zealand)
Brumbies v Lions in Canberra
Referee: Nathan Pearce (Australia)
Assistant referees: James Leckie (Australia), Andrew Lees (Australia)
Television match official: Matt Goddard (Australia)
Bulls v Rebels in Pretoria
Referee: Chris Pollock (New Zealand)
Assistant referees: Craig Joubert (South Africa), Stefan Breytenbach (South Africa)
Television match official: Gerrie Coetzee (South Africa)
Cheetahs v Crusaders in Bloemfontein
Referee: Bryce Lawrence (New Zealand)
Assistant referees: Marius Jonker (South Africa), Marc van Zyl (South Africa)
Television match official: Shaun Veldsman (South Africa)