In its advice rolled out to all Dutch businesses, the Dutch government has told its exporters that "if a large part of your product consists of parts from the UK" domestic exporters may lose free trade access under existing deals.

The advice says: "Brexit will have consequences for exports outside the EU.

"After Brexit, parts made in the UK no longer count towards this minimum production in the European Union."

https://news.sky.com/story/european-businesses-advised-to-avoid-using-british-parts-ahead-of-brexit-11395908