Original sentence: During the course of the Mau Mau legal battle in London, a large amount of what was stated to be formerly lost Foreign Office archival material was finally brought to light, while yet more was discovered to be missing.The files, known as migrated archives, provided details of controversial British actions in its colonies during the final stages of empire, including during Mau Mau, and even after decolonisation
Edited sentence: During the course of the Mau Mau legal battle in London, a large amount of 'lost' Foreign Office archival material was finally brought to light, and yet more was discovered to be missing.The files, known as migrated archives, provided shocking details of criminal British actions in its colonies during the final stages of empire, including during Mau Mau, and even after decolonisation