The British Retail Consortium research shows:
- The most notable impact from the Olympics was felt online, which saw growth of 4.8% in August, the lowest since the BRC started collecting data on internet sales in October 2008.
- Warmer weather in the middle of August helped boost sales of food, especially party snacks such as crisps, nuts and barbecue foods.
- Clothing had an "unusual and rather disappointing" month, the BRC said, as womenswear retailers failed to attract customers to autumn/winter ranges.
More top news
The 60-year-old, whose daughter died of cancer, is taking her case to the Court of Appeal after losing a High Court action.
Leicester City star Jamie Vardy will marry his fiancee Rebekah Nicholson in a lavish ceremony on Wednesday.
Straight-A student Andrew Jones was barred from giving a speech at his graduation because of his school's policy forbidding facial hair.