They didn't scream so we now know they were sleeping rough? (Cf lamentably recent & damnably lamentable court judgements and the Bible on the screaming though tbf a connection to homelessness isn't made even in those.) Having read that claim I strongly doubt the author has suggested a proof that the women weren't prostitutes rather than 'labelled' as ones. Surely the murder of a prostitute is as odious as that of someone labelled as one or indeed of anyone else. Assuming you mean the city of London & not the City of London, the poor weren't huddled in piles throughout it nor would they have been allowed by authorities to have been; they were most obviously concentrated & starving & driven to desperate measures & dying in the East End. There's nothing in the least celebratory about scones and tea.

I'm only going by what you say of the book. If I've got a good idea of it I think you might want to look further into its author's research before you celebrate it with stodgy bread rolls and milky tea.