More than double the amount of deaths were registered in week 16 of 2020 compared with the same period in 2019, according to the Continuous Mortality Investigation (CMI).
The figures come from the CMI's weekly mortality analysis statistics linked to the coronavirus pandemic as the UK enters its sixth week of lockdown.
The CMI's mortality monitor shows this week's update position as of 11 April to 17 April, based on provisional England and Wales deaths data published by the Office for National Statistics (ONS) yesterday (28 April).
A total of 2.4 times as many deaths were registered when compared to the same week last year with the ratio at 1.8 in week 15 and 1.6 in week 14, compared to 2019 figures.
Government advisers have said the virus has reached its peak in England and Wales, with CMI figures showing excess deaths in week 16 were 1.5 times the number of registered deaths where Covid-19 was mentioned on the death certificate.
This latest CMI update also found there may have been around 45,000 more deaths in the UK for the year to 27 April 2020 than if mortality rates were similar to those experienced in 2019.
CMI projections committee chairman Cobus Daneel said: "Our ongoing analysis suggests that the true impact of the coronavirus pandemic is roughly double that of commonly-quoted figures for deaths in hospitals.
"This not only shows that a large number of Covid-19 deaths are occurring outside hospitals, but also suggests that there are significant knock-on effects not directly attributable to Covid-19."
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