Thousands of Londoners have reported hearing a large ‘explosion’ today (December 1)
The bang was heard at about 4.20am local time, rocking homes and people have reported their houses shaking.
Police have said they are investigating and that there is no cause for public concern.
Herts Fire Control tweeted: ‘We are currently receiving a large number of calls from across the whole of Hertfordshire regarding a large explosion sound. We are investigating.’
The loud noise that sounded like an explosion was in fact two jets taking off after communications were lost with an aircraft. The noise was a sonic boom