Just when we had *almost* gotten over the tearfest that the beautiful John Lewis Christmas ad – there's another one to set us off!

This Sainbury's advert for the festive season is based on true events from one hundred years ago. 

The short movie was made in association with The Royal British Legion and all profits made from the chocolate bar featured in the video and on sale in Sainsbury's stores will go towards the Legion. 

Tissues at the ready, ladies…