Harriet Ware-Austin grew up between the UK and Ethiopia where her father worked. It was a unique and wonderful upbringing but that all changed suddenly in April 1972 when East African Airways Flight 720 departed from Addis Ababa airport en route to England. On board were Harriet’s two older sisters who were travelling back to the UK for school. Harriet and her parents waved them goodbye from a viewing platform and watched the aeroplane taxi down the runway and briefly lift off. Tragedy struck when very soon afterwards the plane crashed down resulting in the deaths of 43 people including both of Harriet’s sisters, Jane aged fourteen and Caroline who was twelve.

The family moved back to the UK and had to adapt to the silence of life without the two girls and the reluctance in society to talk openly about death and grief. The transition was a “horrible shock” and Harriet felt she had a responsibility to compensate for the loss of her siblings and to avoid making any trouble for her parents.

This event has had a profound effect on Harriet’s life and the decisions she has made since. Now a human rights consultant, Harriet has recently decided to try and track down survivors and other relatives of the crash victims to find out how the course of their lives were also changed in that moment.

Is there an extraordinary turning point in your life that you’d like to share? You can contact the programme at Lifechanging@bbc.co.uk