Brandon Butler writes: More fallout from Brexit, this time for tech companies. The UK voting to leave the EU could create huge headaches for companies with international operations. When the UK is part of the EU it has the same data sovereignty laws as other member countries. When the UK breaks away, those laws could change. Although no official data privacy laws have been established yet, companies operating in Europe may have to manage one set of data privacy laws for the UK and another for the EU post-split.