Re: ...so long, farewell: hosting & Data Protection
Leaving the EU and not joining the European Free Trade Association (or the European Economic Area or negotiating free trade agreements etc) are 2 different things. Ask Switzerland or Norway.
Apart from that, WTO regulations already prohibit import tariffs etc.
As for data protection: if the US can get their dodgy Safe Harbor provisions through the EU, perhaps a non EU UK will be able to prove that their data protection is good enough to meet EU standards (then again, maybe not).
Unfortunately, every politician that thinks our countries should stay in the EU (and/or the EU should move to fiscal/political union regardless of the voters' wishes) trot out the sham argument that leaving the EU means cutting trade etc.
Happens here in Holland, too.