John Herbert Symondson listed in the April to June 1890 birth index, Pancras, London, vol ume1b page 113

In the 1891 census St Pancras civil parish, St Pancras ecclesiastical parish at 88 Allcroft Rd.
Alfred E. Symondson married, age 27 born at St. Pancras, wharehouseman Somerset House.
Wife Lydia A. Symondson age 27 born at St Pancras.
Sister Kate B. Symondson mantelmaker dress, age 17 born at St. Pancras.
Daughter Lydia K. Symondson age 6, born at St Pancras.
Daughter Edith K. Symondson age 4, born at St Pancras.
Son Alfred H. Symondson age 3.
Son John H. Symondson age 1.
[Note There are Symondsons living at 3 different residences on Allcroft Road in this census Frederick at #4, Henry and Horace at #8 and Alfred and his familiy at #88]

In the 1901 census living at 38 Grafton Terrace, St Pancras civil parish,London, St Andrew eclessiatical parish, St Pancras district, Kentish Town sub district.
Alfred Symondson, age 37, principal warehouseman Somerset House, born at Kentish Town, London.
Wife Lydia age 37 born at Hampstead, London.
Daughter Lydia age 16, dressmaker, born at Kentish Town, London.
Daughter Edith? age 14, born at Kentish Town, London.
Son Alfred age 13, born at Kentish Town, London.
Son John age 11, born at Kentish Town, London,
Son Percy age 7 born at Kentish Town, London,
Son Frank age 4, born at Kentish Town, London.
Daughter Dorothy age 1, born at Kentish Town, London.

In the 1911 census 28 Montagu RD Hendon, Hendon district, Middlesex.
Head A. V. Symondson, married 27 years, male, age 47, civil servant western house, born St. Pancras.
Wife L.A. Symondson, age 47, born Hampstead.
Daughter E.V. Symondson, single, age 24, female tellers, Somerset House, born St. Pancras.
Son J.H. Symondson, single age 21, no occupation at present, born St. Pancras.
Son P.S. Symondson, single, age 17, boy messenger, born St. Pancras.
Son F.V.C? age 14, boy stamper, born St. Pancras.
Daughter D.M. Symondson age 11, school, born St. Pancras.
Son R.B. Symondson age 9, school, born London Goshel Oak.

There is a possible listing from the National Archives DocumentsOnLine for a John H. Symondson Regimental Number 501735 a Private in the Labour Corps, He received the Victory Medal and the British medal.

In the July to September 1921 Marriage index there is a John H. Symondson, Hendon district Middlesex volume 3a page 967. The spouse is listed as Ethel M. Cannon

1939 England and Wales Register
29 Deefield Cottages, Hendon, Middlesex
1. John H. Symondson, born February 19 1890, married, packing case labourer, Air Raid Warden Hendon B.
2. Ethel M. Symondson, born March 10 1897, unpaid domestic duties
3. Record Officially closed

In the April to June 1965 death index, John H. Symondson, age 75, Hammersmith, London, volume 5b, page 584.

In the April to June 1897 birth index Ethel Mary Cannon, Hendon, Middlesex, volume 3a, page 243.

In the 1901 census 13 Belle Vue Rd, Hendon, Middlesex.
Head Alfred Cannon, age 37, Bricklayer’s labourer, born Margrove Hertfordshire.
Wife Lucy Cannon, age 36, Wash Laundress, born Hendon, Middlesex.
Daughter Lucy A. Cannon, age 15, born Hendon.
Daughter Clara Cannon, age 13, born Hendon.
Son George Cannon, age 10, born Hendon.
Daughter Florrie Cannon, age 7, born Hendon.
Son John W. Cannon, age 6, born Hendon.
Daughter Ethel M. Cannon, age 3, born Hendon.
Daughter Elsie M. Cannon, age 7 months, born Hendon.
Lodger Maria Clark, age 78, widow, born Quainton, Bucks.

In the January to March 1981 death index, Ethel Mary Symondson, born March 10, 1897, Slough, Buckinghamshire.