Harry Lamin's letters home

I spotted this link on Yahoo, and checked it out. It's very interesting, and seems to have been quite popular for the last year or so. Has anyone come across it before? It has had a BBC progam made about it

It's a collection of letters written by a W.W.1 soldier called Harry Lamin. His grandson was given the letters, and he is putting them on his blog on the same dates as when they were written 90 years ago. Nobody knows what happened to Harry yet, and won't find out until the equivalent date when the war is over, or a telegram is delivered to his family.

It's really interesting, with pictures and comments.