Man in the middle: Andy Woolmer
Andy Woolmer will be the man in the middle for Swansea CIty's Championship clash with Bristol City at Ashton Gate.
The experienced Northamptonshire official has already taken charge of the Swans this season, having been the man at the helm of the thrilling 3-2 win over Brentford in December.
Woolmer has been officiating in the Football League since 2004, and once refereed at the Vetch Field in a 1-0 win over Leyton Orient.
He will be assisted by Nigel Lugg and Robert Merchant, while Chris Sarginson will be the fourth official.