Hi Poppy I have news paper cuttings, also a private letter from a historian with a more vivid account.
I can share them with you if you want as I know you are interested in history, or I can post them on here.
His brother (who was I think 3 years older) however was in the 1st Battalion Gloucestershire along with him perished when the trench collapsed.
Despite efforts to dig the men buried with bare hands by others they sadly persished.
I can only imaging what it must have been like for my grandfather witnessing that happening to his brother

We have no details at all about this incident and I am wondering if that is something you would be able to trace?
His name was Walter Ralph Westbury.