You asked
What were the total number of deaths in UK for 2020?
We said
Thank you for your request.
We are responsible for the production of Mortality data for England and Wales, this is driven by information collected from the death certificate at death registration. National Records Scotland (NRS) and Northern Ireland Statistics and Research Agency (NISRA) are responsible for statistics pertaining to Scotland and Northern Ireland. They can be contacted at foi@nrscotland.gov.uk and info@nisra.gov.uk respectively.
Whilst the data has not yet been finalised for 2020, all three Statistical authorities have published blogs with year-end figures.
England and Wales - https://blog.ons.gov.uk/2021/01/12/counting-deaths-involving-coronavirus-a-year-in-review/. Please scroll down to the 'Total deaths' heading in this publication to view the provisional total number of deaths registered in England and Wales in 2020.
Scotland - https://www.nrscotland.gov.uk/files//statistics/covid19/annual-deaths-excess-deaths-1855-2020.xlsx
Northern Ireland - https://www.nisra.gov.uk/publications/monthly-deaths