There is a quirk in the history of the Six Nations that makes uncomfortable reading for fans of the home countries: the season following the last four British and Irish Lions tours, France, taking shrewd advantage of their rivals' best players falling into a trough of post-tour exhaustion, have won the championship.
England coach Stuart Lancaster is acutely aware of that trend. "Oh yes, I knew that," the England coach smiles when asked if he is worried about Les Bleus' history of post-Lions glory. "Interesting stat."
He has plans to stop it happening again next March. "The key thing is the rest period," he says. "We've got in place agreements with our clubs to allow those in the Lions squad time to recover. The season finished on July 8. If you were knocked out in the Premiership your season ended on May 5, you were back in pre-season training on June 25.
"In the past, Lions players would have been straight back into the club action. But clubs are very sensible now, they don't rely on senior players as much, they have big squads they can rotate. We must get that bit right. It is going to take management."
Management is something Lancaster believes in; actually, more than that, he has invested his life in its pursuit. In his sporting view good structure provides a framework in which excellence can flourish: the manager's job is to remove obstacles from the pathway to success. Since he was confirmed as England coach in March 2012 he has been working tirelessly to reinforce English rugby's systems, happy to borrow ideas and innovations from others.