The story of the singing group made up of the wives of soldiers, who appeared on the BBC2 series "The Choir" and went on to have the Christmas number 1 last year. A tale of heartbreak, hope, love and loss, it speaks to the heart of the country, and has inspired millions. From the loneliness of life on a military base to the challenge of writing to men facing unimaginable horrors, these are moving and affecting stories.