‘Wonderkid’ Marcus Smith is not yet ready for England, Eddie Jones told

• Harlequins’ John Kingston says 18-year-old must not be used in Six Nations• ‘He is a way off being someone to play international rugby’Eddie Jones has been urged to resist any temptation to hand Marcus Smith a first England cap during the Six Nations by the Harlequins director of rugby, John Kingston, after the teenage fly-half orchestrated his side’s 50-21 thrashing of Northampton.The 18-year-old had a hand in five of Quins’ seven tries here on his 11th Premiership appearance, in front of the watching Jones. On Friday, Smith was selected for England’s training camp in Brighton but again as …