You asked
How many children have been living in relative low income households for the calendar years 2016, 2017, 2018? I would like this information specifically for a) the London Borough of Sutton, and b) the SM6 postcode.
We said
Thank you for your request for the number of children living in relative low income households.
Unfortunately we do not hold this information. The Department for Work and Pensions (DWP) is the government department responsible for producing the official estimates of income and poverty in the UK and better able to look into your request. DWP publish a series called 'Households Below Average Income' that you may wish to look at. You can find the relevant statistics at:
https://www.gov.uk/government/collections/households-below-average-income-hbai--2