Hi
This is him in 1901. He would have been 14 at the outbreak of the war so old enough to serve at sometime in either in the merchant or Royal Navy during the war.
1901 census RG13 615 folio 55
Camden Terrace Farnham Surrey
Louisa Frizzell 35 Head Married Farnham Surrey
Florence Smith 12 Daughter Farnham Surrey
Bertha Smith 10 Daughter Ascot Berkshire
John Smith 5 Son Farnham Surrey
Victor Smith 3 Son Aldershot Hants
Arthur Frizzell 8 months Stepson Farnham Surrey
Eliza Frizzell 13 Stepdaughter Farnham Surrey
William Frizzell 11 Stepson Portland Devon
John Frizzell 10 Stepson Portland Devon
Ada Frizzell 8 Stepdaughter Portland Devon
George Frizzell 6 Stepson Portland Devon
Portland is actually in Dorset
1891 census RG12 1650 folio 20
1 Bloomfield Terrace Portland Dorset
Thomas Frizzell 30 Head Married Dorchester Dorset
Jane Frizzell 28 Wife Married Luch? Dorset
Emily Frizzell 8 Daughter Portland Dorset
Eliza P Frizzell 3 Daughter Portland Dorset
Wm C Frizzell 2 Son Portland Dorset
John T Frizzell 4/12 Son Portland Dorset
Marriages Dec 1899
Frizzell Thomas Farnham 2a 268
Smith Louisa Farnham 2a 268
Arthur is not included in The National Archives online index for 'Campaign Medals awarded to First World War Merchant Seamen' or 'Royal Naval Seamen (1853 - 1923)' for ratings.
It is possible to search the database on place of birth and date of birth
There is an Arthur Leslie Cooper born Farnham who gave his date of birth as 2nd May 1895 (there is a birth registration for this man).
http://www.nationalarchives.gov.uk/documentsonline/royal-navy-service.asp?WT.hp=Registers of Seamen's Services
Regards
Valda