Hi I wonder if someone can help. I know that the Germans bomb the records in WW2 which destroyed 60%? of WW1 army records. I am looking to trace my grandfather Arthur Wiltshire who was in the hampshire yeomanry 1915 but went over to the RFA Royal aritllery and his service area was egypt ending the war in syria his hampshire service number is 2720 and his gunner service number is 267394. I am wondering that his hampshire yeomanry number and his time with them may still be about?

Many thanks