What is known as the “Brussels effect” on global regulation - here applied to data/privacy, in pictures. CEO of worlds most valuable company comes to Brussels to praise EU (and so currently UK) privacy protection standards - GDPR, suggests them for the world.
And Facebook said the same a few months back, Zuckerberg saying the EU’s standards would be rolled out across the world: 
Of course our brilliant new Tech Correspondent @rowlsmanthorpe and @nmsonline are well ahead - and have done this video report explaining all featuring Tim Berners Lee
As a prism through which to assess the various Brexit options:
In theory post Brexit UK Govt could free smaller businesses from red tape burdens of GDPR.
Vs
No UK influence on shaping the emerging global standard vs Big tech. Ireland more powerful. & painful No Deal situation
In theory post Brexit UK Govt could free smaller businesses from red tape burdens of GDPR.
Vs
No UK influence on shaping the emerging global standard vs Big tech. Ireland more powerful. & painful No Deal situation
UK information commissioner seems non-upbeat on Brexit data issue - she hopes “cooler heads prevail” and there is “at least” a transition where UK can apply to be certified under EU adequacy provisions so that data can continue to flow... didn’t say what would happen re No Deal
