These details for 1901 and 1911 are correct if he was, as he told RIC , born in 1892. Dates between 1890 & 1899 were usually correct
1892 Feb 12 born London (the only one that fits is Greenwich)
1901 census in Plumstead
1911 census at Plumstead
There are too amny Albert E Heads and I cannot get him in WW1
1919 Feb 3 married Walthamstow, St James, Essex, England to Daisy Maria Gray . His father is gaven as William Head
1921 Jun 16 enlisted with RIC no 81780. Labourer & ex-Soldier
1939 Register living at Wanstead with . He is a Coffee Shop Assissant. With wife Daisy
1965 Died Esssex