And that has led the British and Irish Lion to call time on an illustrious international career.

He said: “This has been a difficult decision as I have always regarded selection for my country as a huge honour and not something that I would ever take for granted.

“I have discussed matters with my wife and family and believe the time is now right to bring my Scotland career to an end. I want to thank all those who have supported me over the years.

“The physical commitment to play international rugby is widely recognised but there is also a huge time commitment and you cannot compromise when it comes to international rugby. It has to be everything.

“During my career I have not had many injuries and, in one guise or another, I have spent every summer away playing rugby since 1994, often in the intense environment of the Test arena.

“I have joined Leeds Tykes on a two-year contract and I am looking forward to playing club rugby. International rugby is now a closed chapter for me.

“I have been immensely proud to pull on the Scotland jersey and to lead my country in 11 internationals. I enjoyed the recent Lions tour to New Zealand and was privileged to captain the team to victories against Otago, Manawatu and Auckland.

“My decision is not about coaching regimes, leaving the Glasgow Warriors or joining Leeds. It’s about what’s best for me at this stage of my rugby career and in my personal life.”