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Blaise Florence Metreweli CMG (born 30 July 1977) is a British civil servant, currently Chief of the Secret Intelligence Service (MI6), following the retirement of Sir Richard Moore. She is the first female chief of MI6.
Metreweli’s father, Constantine Metreweli, was born Constantine Dobrowolski, the son of Nazi collaborator Constantine Dobrowolski, in Snovsk in the Chernigov Oblast of the Nazi-occupied Ukrainian Soviet Socialist Republic in 1943. He came to England with his mother, who then married David Metreweli in Yorkshire in 1947.

Constantine Dobrowlski became a Nazi collaborator, known as Agent 30 to the Wehrmacht. His activities as a collaborator over the next two years are recorded in a file running to hundreds of pages in the German Federal Military Archive in Freiburg im Breisgau. Having returned to his home district of Sosnytsia, he organised a 300-strong Ukrainian police unit which assisted in rounding up and killing Jews and Ukrainian partisans. He rose to become a local intelligence chief for the Nazis in Chernigov, having first collaborated with the Hiwi, before joining the Wehrmacht’s secret military police Geheime Feldpolizei in July 1942. He was dubbed “the “Butcher” by partisans, and there are accounts of him sharing in loot taken from Holocaust victims and condoning the rape of women prisoners. The Soviets offered a 50,000-ruble bounty—£200,000 today—on Dobrowolski, calling him “the worst enemy of the Ukrainian people.”
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