Albert John Brockman was the son of John William Brockman and Mary Brockman (nee Cooper) His parents were married on the 12th May 1883 at St.James the Less Church, Bethnal Green, London.
1891 Census: 14 Shooters Hill road, Charlton next Woolwich, Kidbrook, London - Albert was born in 1886 at Leytonstone, Essex
1901 Census: 49 Groombridge Road, Hackney – Albert is with his grandmother Clara Brockman.
1901 Census: 26 Victoria Drive,  Hoylake, Cheshire - Parents and siblings are residing here. 
1911 Census: Lynton, Ashbourne Avenue, Blundellsands; Liverpool - His parents and siblings are residing here but no trace of Albert John. Father John was manager of Iron and Steel Works and also in 1901. 
Albert had siblings Ernest, Lillian May, Keith Cooper and Vera May
A report on his death appeared in the Liverpool Echo on the 16th August 1916. His photo appeared in the report and is reproduced here with the kind permission of the Liverpool Daily Post & Echo.
   Second-Lieutenant Albert John Brockman, of the King's Own Royal Lancaster Regiment, has been killed. He was he second son of Mr. John William Brockman, of "Lynton," Ashbourne-avenue, Blundellands, a director of Fredk. Braby and Co., Ltd., of London, Liverpool, and Glasgow. Lieutenant Brockman was formerly with the Eastern Telegraph Company. He was educated at the City of London College, finishing his linguistic training on the Continent.

Liverpool Echo 16th August 1916

Probate of his estate was obtained at Liverpool on the 8th December 1916. His effects were valued at £550 14s 8d (£51,000 at current values.)
A death notice appeared in the Evening Express
Newspaper (date) Evening Express (16-Aug-16)
Rank, Forename(s), Surname 2nd Lieutenant Albert John Brockman
Regiment, Regimental No, medals Kings Own Royal Lancaster Regiment
Cause and date of death, age Killed in Action 08-Jul-16 aged 30 years
Information contained in notice Second son of John William Brockman address Lypton Ashbourne Avenue Blundellsands