BRITISH singer/songwriter Dame Vera Lynn is on course to make the top 20 at the age of 97, it's been revealed.The Forces' Sweetheart released 'Vera Lynn: National Treasure - The Ultimate Collection' at the beginning of this week, and it's already flying off the shelves. If the strong sales continue throughout the week, Dame Vera could even make the top ten and will extend her lead as the oldest living artist to figure so high up in the album chart. Her last major chart feat was five years ago when she achieved a number one with an earlier best-of release....