The UK government have published a guidance on a new UK product safety mark that would need to be placed on products in the event of a no-deal Brexit. The new mark, UKCA (UK Conformity Assessed), would replace the CE mark that shows consumers that an item meets EU legal requirements and testing.
Goods already on the market by March 29 will be able to continue to circulate in the UK. And for a limited time period, goods made and assessed against EU regulatory requirements can also be placed on the UK market with the appropriate EU marking, such as the CE.
Goods made in the UK which are exported to the European Union may have to be stamped with both marks. For some products that could also mean two sets of tests, as EU nations may not recognize ones done by UK organizations.