Bexley, Bromley, Greenwich, Lambeth, Lewisham, and Southwark.
If one or more of those London Boroughs appears in your family history, browse to https://ideal-homes.gre.ac.uk/boroughs.html. For each, find histories, galleries, historic maps, case studies and individuals’ contributions for communities within the borough.
BIFHSGO has an extensive list of London Resources found under its Links to Online Resources page.