A leaked government report suggests a "reasonable worst case scenario" of 85,000 deaths across the UK this winter due to COVID-19.
The document also says while more restrictions could be re-introduced, schools would likely remain open.
But it says the report "is a scenario, not a prediction" and the data are subject to "significant uncertainty".
However some are critical of the modelling and say some of it is already out of date.
The document, which has been seen by BBC Newsnight, was prepared for the government by the Sage scientific advisory group, which aims to help the NHS and local authorities plan services, such as mortuaries and burial services, for the winter months ahead.
Source: BBC News, 29 August 2020