The Isis caliphate, which once stretched for thousands of miles across Iraq and Syria, has been declared defeated. The Syrian Democratic Forces, a US-backed group of Kurdish and Arab fighters, announced on Saturday that it had captured the last territory held by the group. Is Isis still a threat to the UK and other countries around the world? Yes. Thousands of former Isis fighters who joined the group from countries around the world are thought to have returned back to their countries.The group has also extended its franchise outside of Iraq and Syria. According to the Counter Extremism Project, the group has declared wilayat (provinces) in Iraq, Syria, Egypt, Libya, Algeria, Yemen Saudi Arabia,Nigeria, Afghanistan, Pakistan,  and the North Caucasus.