Hi, I've just found this post from a couple of years ago.
I've been researching the Dorrington family today, all from Brighton as Alfred's brother John Alfred married Amelia Pilbeam who is slightly sideways in my family.
From another website, I understand that Alfred was killed in Epehy in the Somme on 10 September 1918.
If you want more information, send me a personal message and I'll try to fill you in on the gaps.
Sorry to be the bearer of bad news ....
Lindsey