We, members of the Tigray Diaspora in the UK and together with the Tigrayan Diaspora in Europe and in solidarity with the Global Tigrayan Diaspora Communities, are writing this letter and will be gathered on 21 September 2023 in front of the Office of the UN Human Rights Council in Geneva, Switzerland, to demand that the ongoing mass atrocities committed in Tigray must be stopped, and fully and comprehensively investigated by independent, transparent and international body. As testified by the June 2023 Report on Tigray, Ethiopia, by Human Rights Watch, the Amhara Paramilitary Fano and Eritrean forces have continued to commit mass atrocities in Tigray. To date, over one million Tigrayans have perished, over 120, 000 Tigrayan women and girls subjected to sexual violence and rape and over 2 million Tigrayans continued to be internally displaced due to genocidal occupation of Tigray. The mass atrocity crimes committed in Tigray is the worst mass atrocity crime humanity has witnessed yet in the 21st Century and must be fully and comprehensively investigated for justice to prevail.