Retail Sales Data
ONS Predominately Food
The Retail Sales Index (RSI) (value, non-seasonally adjusted) measures the performance of Predominantly Food stores sales, expressed as annual percentage growth compared with the same month in the previous year. This index measures the value of retail sales in Great Britain on a monthly basis and does not adjust for seasonal variations (e.g. the timing of Easter)
Office for National Statistics
Retail Sales Index
Subscribers can download 10 years' worth of data.