Touch judge
A touch judge is an official who monitors the touch-line in a rugby union or rugby league game and raises a flag if the ball goes into touch. Touch judges also stand behind the posts to confirm that a goal has been scored following a penalty kick or conversion of a try. There are two touch judges, one for each touch-line and each holding a different coloured flag.
Rugby union
Rugby union touch judges support the referee by marking 'touch', indicating successful kicks at goal, and marking offside lines at set piece plays.Depending on the relevant national regulations, touch judges can be recognised as 'assistant referees' and have the authority to indicate foul play, support with pre-match protocols, and other roles delegated to them by the referee.
In England, touch judges are only recognised as assistant referees when appointed by the RFU or by the relevant Referees' Society. Touch judges in most community matches do not act as assistant referees and cannot comment on foul play or other technical matters.
In test matches, it is normal for the referee and assistant referees to be connected by a radio link to aid the communication of all this information.
At elite levels of the 'sevens' variation of rugby union, additional in-goal assistant referees exist to support the referee with in-goal decisions.