A book, written by a Bridgwater woman about her battle for answers following her son's death in Afghanistan, is being released in shops today - to mark what would've been his 31st birthday.

Sergeant Ben Knight was killed along with 13 colleagues when a Nimrod plane exploded in 2006 - the biggest single loss of life in the British military since the Falklands War.

His mother Trish says she's written the book so her grandchildren, who never knew Ben, will know all about him... and some of the proceeds will go to the charity Medecins Sans Frontieres.