Research exercise · 24 October 2026
Compare inflation and retail sales without mixing measures
A 12-month price-change rate, a one-month sales-volume change, and a three-month sales-volume change cannot be added or treated as simultaneous market signals.
Published . Work from the ONS bulletins released on 21 and 23 October.
Make the evidence table
Create columns for measure, geography, reference period, and comparison. Put CPI 3.5% in a row labelled “UK, 12 months to September, versus 12 months to August 2026 at 3.1%.” Put retail volume −0.4% in a second row labelled “Great Britain, September versus August.” Put retail volume +0.7% in a third row labelled “Great Britain, July–September versus April–June.” Do not combine those rows into one arithmetic total.
Check definitions before a conclusion
CPIH includes owner-occupiers' housing costs and was 3.6% over 12 months to September, while CPI was 3.5%. Retail volume estimates concern quantities after accounting for price changes. A single household's basket and an individual retailer's sales can differ from either national measure. For household planning, compare your own recurring costs with your budget rather than assuming the headline rate is your personal experience.
Record a revision
The ONS revised August's monthly retail-volume increase from 0.5% to 0.7% in the 23 October bulletin. In a research log, record both the earlier estimate and the revised value, with publication dates. A change in a past estimate can affect an apparent trend without representing a new August shopping event.
Keep Bitcoin analysis in a separate column
If your question concerns Bitcoin, first specify a time horizon and the Bitcoin evidence you would need, such as custody, product flows, liquidity, or an actual policy decision. The UK releases do not by themselves demonstrate a price response or justify a trade. Link a claim only after independently sourcing it. Continue with the dated source review, inflation reading checklist, or research method.