Scotland star Nathan Hines believes his experience against the Springboks last year can help the Lions win the Test series in South Africa.
Hines was part of a Scotland team which pushed the world champions all the way in their November clash at Murrayfield, scoring a first-half try to give team the edge at the break.
Only a lack of discipline in the last quarter of the game denied Frank Hadden's side a famous victory as the Boks ran out 14-10 winners.
Australia-born Hines, who qualifies for Scotland and therefore the Lions via his grandfather, is relishing his first experience of the touring side.
He said: "In the second half we were a bit stunned to be in front. We didn't dominate the game for 10 minutes, we made a couple of errors and that's what cost us. But there's a mental toughness with the Lions."
England Under-18 head coach John Fletcher insists his young side will be better for the experience after beating Italy in the bronze final to round out their 2015 Rugby Europe U18 Championship campaign in style.