Have you read The Bank Holiday Murders by Tom Wescott? I highly recommend it, there's some interesting theories and interpretation of evidence in there, especially regarding whether some of the victims knew each other.
Research into the lodging houses, prisons, workhouses and infirmaries has been ongoing for years and there are certain addresses like 18 and 19 George St that some of the women involved in the case have in common, as I mentioned earlier. It is possible the women knew each other in my opinion but good luck convincing anyone who opposes the idea without that photograph!
Indeed - and I wonder if it is the addresses, or owners of the addresses, where they lodged that might provide a more easily demonstrable connection. Though on its own it would merely be an interesting tidbit.