All very well about the pea soupers, but as I recall one, at least, of the murders was done in broad daylight.

We used to have a rock and roll singer called Screaming Lord Sutch who had a record which was a mainstay of his live act, called Jack the Ripper. But it didn't chart. Sutchy was a very popular live act, and several legendary musicians played in his band The Savages.

Sutch was often described as the originator of rock theatre in England.