On 1 September, the Department of Business, Energy and Industrial Strategy published 2 news releases.
One dealt with what you need to do to comply with regulations on manufactured goods you place on the GB market from 1 January – note that it is “GB”, i.e. excluding Northern Ireland! Seeming more complicated than one might have expected, this involves different rules for different products. There is also the question of when, or if, to use the “CE” product marking, which one can in the UK until 31 December 2021, and if/when to use the new “UKCA” marking. However, the UKCA marking won’t be recognised in the EU (or Northern Ireland).
The second news release is concerned with what you need to do to comply with regulations on manufactured goods you place on the EU market from 1 January.
If the products are to on the market in the EU they still need a CE marking, and you want, or have, to use both CE and UKCA markings, if the goods comply with the different regulations…
A third news release is concerned with if you will need to use the new UKCA marking and how to use it. The UKCA (UK Conformity Assessed) marking is a new UK product marking that will be used for goods being placed on the market in Great Britain (England, Wales and Scotland). It covers most goods which previously required the CE marking (n.b. only in GB).
https://www.gov.uk/guidance/placing-manufactured-goods-on-the-eu-market-from-1-january-2021
https://www.gov.uk/guidance/using-the-ukca-mark-from-1-january-2021