There is a census with an Alice M Walker born in 1896 (only one year of 1897 which is her birth on the 1939 register) in 1911 and she is living in Sussex with parents.
1911 Census (Coast Gaurd Station Near Hastings, Pett, Sussex):
james walker b. 1864 Coast Gaurd Chief Officer Head
susan h walker b. 1868 (was born in Geurnsey) Wife
Alice M Walker b. 1896 in Devon, Ilfracombe Daughter
James Walker b. 1901 in Pembrokshire
Evelyn Walker b. 1903 in Glamorgan
Bessie Walker b. 1906 in Somerset
Kathleen Walker b. 1908 in Sussex
It seems like James and Susan travelled a lot, with all the children being born in different places, I think this may be Alice and her family because her sister is called Kathleen making it more likely that she named her daughter after her little sister. Also the birth date and area which she is living in matches up.