You asked
I was looking for data on the average number of items a household in the UK owns, for 2019, and any trended data over the past 20 years, perhaps with a breakdown of the type of item (e.g. electrical goods, furniture).
We said
Thank you for your request for the average number of items a household in the UK owns, for 2019.
We hold information on average expenditure on household items, including electrical goods and furniture. Please see table A1: Components of household expenditure UK, financial year ending 2018. However, we do not hold information on the average number of items in a household.