British Jews and Israeli institutions in the UK have faced a growing threat since the escalation of conflict in the Middle East, MI5 has warned, as the Metropolitan Police commissioner Sir Mark Rowley said he needs 300 more officers to tackle the “pandemic” in the UK. Britain’s terror threat level on Thursday was raised to “severe”, meaning authorities believe an attack in the UK is “highly likely” in the next six months, after the stabbing of two Jewish men in Golders Green, north London.