Next warned the Covid-19 pandemic三级成人视频 will lead to a "very significant" drop in sales of as much as £1bn this year, while Burberry said takings had halved in recent weeks.
The high street bellwether said it is preparing for a "significant downturn" in 2020.
Simon Wolfson, Next chief executive, said: "When the pandemic first appeared in China, we assumed that the threat was to our supply chain.
"It is now very clear that the risk to demand is by far the greatest challenge we face and we need to prepare for a significant downturn in sales for the duration of the pandemic."
In a detailed update, the retailer said it has conducted a coronavirus stress test. It found the company could "comfortably sustain" a loss of more than £1bn of annual full-price sales – a quarter of annual revenues – including some weeks with no sales at all.
The test accounted for the business rates holiday announced by the Chancellor Rishi Sunak on Tuesday, but excluded any use of government lending or any measures that may be introduced to help pay wages .
Next said that, given the unprecedented nature of the crisis, it could not predict the extent of the impact on its retail and online sales.
三级成人视频It has suffered a 30pc drop in full-price sales since Sunday as the disruption from the outbreak began to bite.
Next said some product lines will fare better than others, with homeware and childrenswear sales less affected than adult clothing.
Online sales will perform better than retail during disruption but will also suffer significant losses, Lord Wolfson said: "People do not buy a new outfit to stay at home."