Available dataset: data.london.gov.uk/dataset/smartmeter-energy-use-data-in-london-households

Power-Networks-LCL-June2015(withAcornGps)	meter reading

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Australian smart-city dataset:
data.gouv.au/dataset/smart-grid-smart-city-customer-trial-data
Now unavailable, but maybe some hope https://data.gov.au/datarequest/98266a0b-6e0c-4092-9e3b-9e3b4cab20ad

CDINTERVALREADINGALLNOQUOTES.CSV.7z     meter reading
sgsc-cthanplug-readings.7z              Home Aread Network Plug readings

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EDF data (undisclosed)
2009.rar				25K data for year 2009
2010.rar				25K data for year 2010
2011.zip				25K data for year 2011