Hi looking for more info on my grandads brother he was killed on the first day of the Somme his name was William Draper service number 15701 and is buried at Dantzig Alley British cemetery Mametz.he was born in Aston Birmingham in 1895 ,can anyone tell me why he would be in the West Yorkshire regiment ( Prince of Wales own) and not one of the pals Regiment and how would I get information on where and how he lost his life