You asked

I would like to request the following data set:

https://www.ons.gov.uk/peoplepopulationandcommunity/personalandhouseholdfinances/expenditure/datasets/expenditureonmortgagesbymortgageholdersuktable29

Would it be possible to have a breakdown of the average mortgage interest payments per County in England?

We said

Thank you for your request for average mortgage interest payments per county in England.

The figures you refer to come from the Living Costs and Food Survey, which has an achieved sample of approximately 5,000 households annually. This means that it is not suited to analysis below regional level. Additionally, the sample is designed to achieve a spread of households across regions, but not across smaller areas such as counties or districts. As a result, a county could have a low number of households sampled in any given year; we would not consider expenditure averages calculated from low sample numbers to be reliable.

You can find a geographical breakdown of this table by region here:

https://www.ons.gov.uk/peoplepopulationandcommunity/personalandhouseholdfinances/expenditure/datasets/expenditureonrentandmortgagesbyrentersandmortgageholdersbycountriesandregionsuktable211