Dan Walker has paid a heartfelt tribute to England World Cup hero Jack Charlton following his sad death at the age of 85 on Friday.The BBC Breakfast host took to Instagram to share a poignant message about the late football star, who passed away peacefully at his Northumberland home following a long-term illness, his family said.In memorial: celebrities who have passed away in 2020WATCH: Dan Walker apologises after BBC guest's blunderPosting a throwback photo of Jack, Dan wrote: "Big Jack