The ONS who calculate the UKs GDP are aware of this and have an interesting report on it: https://www.ons.gov.uk/economy/inflationandpriceindices/articles/thei

The ONS who calculate the UKs GDP are aware of this and have an interesting report on it: https://www.ons.gov.uk/economy/inflationandpriceindices/articles/theimpactofshrinkflationoncpihuk/howmanyofourproductsaregettingsmaller https://www.ons.gov.uk/economy/inflationandpriceindices/arti... "In order to accurately measure inflation, we use quality adjustment processes to account for any changes to a product’s weight, volume or size"