Survivor by Lesley Pearse

It is 1938 and Mariette Carrera is a defiant, strong-willed and selfish seventeen-year-old. And sooner or later, if she stays in the small, gossipy town of Russell, New Zealand, she'll get herself into some serious trouble. Her doting parents, Belle and Etienne, fear for her reputation. So, with the world on the brink of war, Mari leaves home on the SS Rimutaka, bound for her aunt and uncle's house in London.
Armed with the freedom she's longed for since childhood, Mari quickly falls for Morgan, the handsome cockney steward on board ship. But once she reaches London, there are other temptations.
Mari loves her new life - caught up in a whirl of dances and parties in the glittering West End, relishing her freedom as she earns her own money as a typist. Finally, she feels she is mistress of her own future.
Until it is all snatched away by the war.
As London endures the Blitz, Mari's new life is cruelly blown apart. Forced from her loving new home, she ends up alone in the East End, and it's worlds away from the London she knows. But there, even in the face of so much despair, she finds the chance to make a difference. Amidst the destruction, Mari learns that the only way to survive this war is to fight, with all the strength, selflessness and compassion within her…and only then will she find true happiness.