My great uncle was Arthur Edward Boulter who died on HMS Vanguard on 9th July 1917. He was born on 3rd December 1899 in Leytonstone, Essex
. The only photo I have of him was taken before 1912 and shows him in Naval uniform, with a hat band for HMS Vivid, which was a training establishment in Plymouth. The main photo is of the family and can be dated because his elder brother Frederick on the right is recorded as having died and is buried in Aden on 24th May 1912. I have also included a cropped copy of Uncle Arthur by himself. I do not know what rank he held - Probably a junior Seaman because of his age.
I hope you find this information useful