So she's born in 1915, is that right?
Presumably the significant events should be things that would make an impression on her at her particular age? So -
babyhood, First World War - confusing comings & goings & people being suddenly happy & sad
age 3/4, Spanish flu epidemic
age 12/13, first radio broadcasts by BBC
age 18, German Jewish refugees in Britain
(her) twenties, Second World War - contrast with faint memories of First??
thirties, austerity - you have to read this extraordinary book
forties, Harold McMillan, "You never had it so good" and hints of sexual revolution (& probably feeling a bit left out of the latter)
fifties, Virago Press & feeling back in the swim
sixties, Greenham Common ...
I think I am channelling Posy Simmonds here.