Like-for-like retail sales in central London in August rose 8.2% outperforming the UK as a whole, which saw like-for-likes fall 1% over the month.
The British Retail Consortium said that strong tourist spending contributed to the rise. Miserable August weather and high fuel costs made indoor London shopping more attractive than outdoor leisure or trips further afield.
Clothing and footwear sales were helped by special promotions and discounting.
Like-for-like retail sales in London for the three month period ended August rose 7.8% versus a 0.8% decline across the rest of the UK.
The BRC said that footfall in London in August was not as strong as it had been in May and June.