- Output Area Population Estimates (Office for National Statistics: https://www.ons.gov.uk/peoplepopulationandcommunity/populationandmigration/populationestimates/datasets/censusoutputareaestimatesinthelondonregionofengland)
- Entrances/Exits out of stations ("London Underground passenger counts data" on this link: https://tfl.gov.uk/info-for/open-data-users/our-open-data)
- Rolling Origin-Destination Survey ("Rolling Origin & Destination Survey (RODS)" on this link: https://tfl.gov.uk/info-for/open-data-users/our-open-data)
- Station locations (two sources: https://commons.wikimedia.org/wiki/London_Underground_geographic_maps/CSV, https://tfl.gov.uk/info-for/open-data-users/our-open-data)
- Station connectivity (https://commons.wikimedia.org/wiki/London_Underground_geographic_maps/CSV)
- Origin-destination schedule and trip duration (TripGo API)
- Output Area shapefiles (I think from here: https://data.london.gov.uk/dataset/statistical-gis-boundary-files-london)