If momentum swings decide rugby matches, discipline is almost always at their fulcrum.

There are different forms of discipline, of course. Releasing an over-ambitious offload – rather than holding on and trusting teammates to recycle the ensuing ruck – can surrender possession, extinguishing a chance to score or even allowing the opposition scope to counter-attack.

After the British and Irish Lions’ 22-16 defeat to the Blues at Eden Park on Wednesday, Warren Gatland bemoaned a more conventional aspect of discipline. He justifiably highlighted his side’s penalty count as a chief reason for the loss.

The tourists incurred the wrath of French referee Pascal Gauzere for 13 full penalties. Ireland conceded four when they beat New Zealand in Chicago.

More important than the quantity of these infringements, though, was their context. Gatland did admit that his defence coach and enforcer had already made that point.

“The big message from Andy Farrell to the players was the penalty count,” he said. “And the penalties that were avoidable.”

The second part of this quote is key. In one sense, recklessness should be easy to fix. In another, it will certainly continue to cost the Lions if it carries on. So, which penalties conceded against the Blues could, and should, have been prevented? Moreover, with a healthy dose of hindsight bias, which of them damaged the Lions most?