Iran has agents in the UK ready to create "mayhem" - increasing fears of a terror attack in the coming months, a former police chief has warned. The threat level was raised to "severe" on Thursday, the second-highest ranking, meaning an atrocity is highly likely after yesterday's Golders Green stabbings and a spate of antisemitic incidents. It comes after British police arrested 26 people for various attacks launched since the start of the US-Israel war on Iran on February 28. There are fears