A joint letter signed by 20 civilian groups including Burma Campaign UK, the World Uyghur Congress and Yezidi Emergency Support, which says the UK has played a key role in the past five years leading the fight to protect the Yazidis when Isis was trying to wipe them out, calls for a role for the UK courts in determining genocide.
Last month UK MPs rejected a Conservative-proposed role for the courts in determining genocide, but peers reasserted their support for the measure by a huge majority. The government has bundled the vote together with a separate Labour proposal on human rights and trade deals, making it less likely to pass.