Just as is the case for countries outside the EU, companies may need import or export licences to trade drug precursor chemicals with the EU.
To apply for an import or export licence companies must have a domestic licence or registration, which usually takes 12-16 weeks to process.
The HSE advises to avoid disruption, companies can check whether the chemicals they trade will be affected and apply for a domestic licence now.
Go to GOV.UK for further guidance.