I have not much information on Alfred J.
There was an Alfred Shakleford’s (sic) birth Registration in Hawarden in 1913, (HAW/15A/98). I contacted the Registrar at Mold and she kindly confirmed that Alfred & Eveline Shackleford were his parents and that Alfred (Snr.) was a Sergeant Instructor living at Hawarden.
He married Eveline Evans in Qtr June 1912 in the District of Birkenhead (Cheshire) (Vol 8a Page 1089)
British Army WWI Medal Rolls Index Cards, 1914-1920 accessible on www.ancestry.co.uk details Alfred’s medals which included the 1914 Star. This suggests that he was at least a reservist, possibly still in the army when war broke out. The card says that he entered his first Theatre of the war on the on 11th November 1914, which again tells us he was in the war shortly after after hostilities began. Alfred was already a military man.
UK, Soldiers Died in the Great War, 1914-1919 accessible on ‘Ancestry’ does not tell us where he was born, resided or enlisted.
A E J Shackleford in the UK, Army Registers of Soldiers’ Effects, 1901-1929 tells us that the sole Legatee was Mrs. Eveline SHACKLEFORD (& Will) who was paid £26. 5s 0d in October 1915 and his War Gratuity of £45 on the 3rd October 1919.