Ben O’Keeffe will oversee proceedings as the fourth weekend of the Guinness Six Nations action gets underway between England and Wales at 4.45pm on Saturday.
England will be seeking revenge after defeat to the Welsh last year, as well as keeping their Guinness Six Nations title ambitions alive with a victory at Twickenham.
The New Zealander will be assisted by a pair of Frenchmen on the touchlines, Romain Poite and Alexandre Ruiz, while Marius Jonker (South Africa) is on TMO duties in London.
Eddie Jones’ men have not lost to Wales in a Guinness Six Nations match at Twickenham since 2012, while Wayne Pivac is looking to avoid a third successive defeat in the Championship.
On the following day, Paul Williams (New Zealand) will be the man in the middle at BT Murrayfield as Scotland hope to register back-to-back wins as they welcome the Championship’s only unbeaten team, France.
Wayne Barnes (England) and Frank Murphy (Ireland) have been appointed Williams’ assistants for the clash, which kicks off at 3pm on Sunday.
The TMO in Edinburgh will be Irishman Brian MacNeice, as the Scots seek a fourth straight victory over Les Bleus at BT Murrayfield.
England v Wales (Twickenham Stadium, England; 7 Mar 2020; 4.45pm)
Referee: Ben O’Keeffe (New Zealand)
Assistant 1: Romain Poite (France)
Assistant 2: Alexandre Ruiz (France)
TMO: Marius Jonker (South Africa)
Scotland v France (BT Murrayfield, Edinburgh, Scotland; 8 Mar 2020; 3.00pm)
Referee: Paul Williams (New Zealand)
Assistant 1: Wayne Barnes (England)
Assistant 2: Frank Murphy (Ireland)
TMO: Brian MacNeice (Ireland)