(Reuters) - Officials have apologised for a sin bin error that allowed Harlequins' Irne Herbst to return to the pitch sooner than expected in Saturday's narrow Premiership victory over Bath.

Herbst came back on approximately three minutes earlier than expected and was involved in a crucial tackle that helped the Harlequins to win 40-36 in a thrilling game where Bath were down 40-3 at one stage.