The British Government has delayed the entry into force of the UK CA (UK Conformity Assessment) up to 1 January 2022 in most cases.
According to the website from the British Government (source) the recplacement of the CE mark is postponed in most cases:
" The UKCA marking will apply to most goods currently subject to the CE marking. It will also apply to aerosol products.
From 1 January 2021 the technical requirements (‘essential requirements’) you must meet – and the conformity assessment processes and standards that can be used to demonstrate conformity – will be largely the same as they are now.
The UKCA marking can be used from 1 January 2021. However, to allow businesses time to adjust to the new requirements, you will still be able to use the CE marking until 1 January 2022 in most cases.
In some cases you will need to apply the new UKCA marking to goods being sold in Great Britain immediately from 1 January 2021. You are encouraged to be ready to use the UKCA marking as soon as possible before this date.
The CE marking will only be valid in Great Britain for areas where GB and EUrules remain the same. If the EU changes its rules and you CE mark your product on the basis of those new rules you will not be able to use the CE marking to sell in Great Britain even before 31 December 2021."