Department store giant John Lewis reported a 7.3 per cent rise in sales compared to last year.
For the week to August 6 sales grew from a 3.4 per cent year-on-year increase on the previous week, pushing its department store sales to £73.7 million.
This is attributed to warm weather driving demand for fans as well as customers buying electronic goods like headphones and cameras for their holidays.
Fashion sales were also reported to be up by 5.4 per cent helped by strong menswear sales.
John Lewis' food retialer Waitrose had a lift in weekly sales of 2.1 per cent because of customers buying Brazilian-styles steaks and wines inspired by the Rio Olympics.
As the only retailer to publish weekly reports, many see John Lewis as a barometer for sales in wake of the Brexit, although the department store has failed to comment on it.