Rule 10.1: Electronic devices, e.g. mobile phones, pagers, smart watches, etc., in active mode are not allowed on the green. Should a player fail to comply, that player shall forfeit the game. The offender(s) to receive no further score and the opponent(s) shall receive the maximum score.
Sylvia has invented a Bluetooth jack so she can listen to her favourite music whilst playing a game, but it still comes in (probably) under the Rule 10.1. Maybe she could argue that the active device sending the music signal to the Bluetooth device (the receiver) is in her handbag that is off the green. Good try though. Perhaps we need a Referee’s view on this?
Source: British Crown Green Bowling Association – “Laws of the Game of Crown Green Bowls (as adopted on March 5th 2022)
Vardre Deganwy Crown Green Bowling Club 