Match officials to May 13

Glen Jackson: Highlanders v Hurricanes

London hosts the final leg of the IRB's Sevens Series and there are play-off matches in the PRO12 and Aviva Premiership tournaments.

It's also the last round of Top 14 league matches and there's plenty of Super Rugby action in the southern hemisphere.

London Sevens

Referees: Federico Anselmi (Argentina), Akihisa Aso (Japan), Jason Jaftha (South Africa),James McPhail (New Zealand), Anthony Moyes (Australia), Luke Pearce (England), Alexandre Ruiz (France), Charles Samson (Scotland)

Super Rugby, Week 12

Blues vs Lions in Auckland
Referee: Angus Gardner (Australia)
Assistant referees: Bryce Lawrence (New Zealand), Sheldon Eden-Whaitiri (New Zealand)
Television match official: Ben Skeen (New Zealand)

Waratahs vs Bulls in Sydney
Referee: Chris Pollock (New Zealand)
Assistant referees: Ian Smith (Australia), Francisco Pastrana (Argentina)
Television match official: George Ayoub (Australia)

Highlanders vs Hurricanes in Dunedin
Referee: Glen Jackson (New Zealand)
Assistant referees: Keith Brown (New Zealand), Matthew Muir (New Zealand)
Television match official: Vinny Munro (New Zealand)

Rebels vs Crusaders in Melbourne
Referee: Jaco Peyper (South Africa)
Assistant referees: James Leckie (Australia), Will Houston (Australia)
Television match official: Matt Goddard (Australia)

Sharks vs Force in Durban
Referee: Mark Lawrence (South Africa)
Assistant referees: Joey Salmans (South Africa), Christie du Preez (South Africa)
Television match official: Johann Meuwesen (South Africa)

Stormers vs Cheetahs in Cape Town
Referee: Steve Walsh (Australia)
Assistant referees: Stuart Berry (South Africa), Cobus Wessels (South Africa)
Television match official: Shaun Veldsman (South Africa)

Reds vs Chiefs in Brisbane
Referee: Marius Jonker (South Africa)
Assistant referees: Andrew Lees (Australia), Simon Moore (Australia)
Television match official: Steve Lesczcynski (Australia)

Pro 12, semi-finals

Leinster vs Glasgow Warriors in Dublin
TBC

Ospreys vs Munster in Swansea
TBC

Aviva Premiership semi-finals:

Leicester Tigers vs Saracens at Welford Road
TBC

Harlequins vs Northampton Saints at Twickenham Stoop
TBC

Top 14, Round 26

Clermont vs Brive at Parc Des Sports Marcel Michelin
Referee: Mathieu Raynal
Assistant referees: Flavien Hourquet, Thomas Dejean
Television match official: Gilles Cogne

Biarritz vs Paris at Parc des Sports D'Aguilera
Referee: Christophe Berdos
Assistant referees: Eric Soulan, Dominique Parrini
Television match official: Daniel Gillet

Agen vs Racing Métro at Stade Armandie
Referee: Jean-Luc Rebollal
Assistant referees: Jérôme Lamirand, Christophe Graviou
Television match official: Laurent Valin

Toulouse vs Montpellier at Stadium de Toulouse
Referee: Franck Maciello
Assistant referees: Nicolas Datas, Régis Gabard
Television match official: Jean-Marie Piraveau

Bordeaux vs Perpignan at Stade André Moga
Referee: Patrick Pechambert
Assistant referees: Adrien Descottes, Laurent Sclafer
Television match official: Eric Gonthier

Lyon vs Toulon at Matmut Stadium
Referee: Romain Poite
Assistant referees: Laurent Millotte, Pascal Ubeda
Television match official: Philippe Bonhoure

Castres vs Bayonne at Stade Pierre Antoine
Referee: Sébastien Cloute
Assistant referees: Laurent Cardona, Christophe Clavere
Television match official: Gérard Borreani