On the changeover in a pairs match, the player of team B delivered a bowl before the player of team A, which had won the previous end. It went un-noticed until the player of team A prepared to bowl. The bowl from the member of team B had disturbed the head.
What should happen now?
Skip A must choose whether to: leave the disturbed head as it is and have their team play two bowls in succession to restore the proper sequence of play, or replace the head to its former position and return the bowl to be played in the correct sequence, or declare the end dead. Laws 29.1.3
A player delivers another player’s bowl which touches the jack. What should happen?
Other player’s bowl must be replaced with the player’s own bowl. The player’s own bowl must be marked or nominated as a toucher. Laws 29.2