There is a WW1 service record for 'Fred' Darvell, who enlisted on 11 December 1915, aged 18 years 9 months.
His address is Wagon and Horses Yard, Chesham, Bucks. [Amersham district]
NoK is father George Darvell of 10 Waggon Horse Yard, Chesham [presumably the same address as Fred, but that is how they were written]
1901 census shows George Darvell and wife Matilda in Chesham with their family. The two youngest children, Fred and Rose are shown aged 6 and 3 years respectively, but I think it should be the other way around.
George Darvell married Matilda Turvey in 1871. Rose Darvell Mmn Turvey was born in 1894, and Frederick William Darvell Mmn Turvey was born in 1897.
I have tried very hard to find them in 1911. Maybe you will have better luck.
