She's lived her entire life in England. Her dad, 2 sisters have all lived their entire life in England. Her mother moved to England when she was 6. Every single one of them has been through the English system, nursery, infant school, junior school and high school. They've all been in London and then Stevenage and have a London accent.
None of them have lived in Turkey. Her mother lived in British Cyprus. Most Cypriots view the idea of Turkish Cypriot in the same way most feel about Israel and Palestine, invading occupiers. She's putting on an accent when she speaks her GCSE Turkish.
In any case, her story about people saying she has a foreign accent is most likely complete bullshit.