We had a similar situation with training new staff and one particular trainer. The trainer would become distracted and not focus on watching the trainee. After an error was made by the trainee during a hands on training session with the guilty trainer, I informed all staff and trainers that conversations during training were not allowed unless work related and then the trainee could not proceed until the trainer was finished attending to the department issue. I was very honest with this policy and why it was necessary. Our focus is on quality to our customers and we don't want to risk errors. Everyone understood and agreed. Just be honest...you don't want mistakes!
