Re: Data economy?
Regrettably, the most serious consequence of Brexit has been that it the consequences of Brexit have to be denied or dismissed.
Brexit was a necessary part of a wider project to reshape Britain in the mould of recent US capitalism (the increasing concentration of wealth and power in small number of hands). It wasn't an end in itself, but it removed the external constraints on such a policy.
It's perfectly reasonable to regard the Brexit event as a watershed moment because pre-Brexit and post-Brexit Britain are two very different places - not because of the economic consequences, but because it has allowed the executive branch of government to "take back control" entirely unfettered by the British constitution or by external obligations. That means there are no defences against a feral government such as the UK currently enjoys.
With respect to this article, it's worth reading the blog from Mariano delli Santi of the Open Rights Group and this from openDemocracy on the new Information Commissioner. It's pretty plain there's been a sea-change in terms of government accountability.
This wouldn't matter so much if it were simply the ebb and flow of the electoral cycle. However, boundary changes and the new laws on voter suppression that would simultaneously extend the ability of rich non-doms to fund one party and suppress the ability of Unions to fund another and put the regulation of election conduct in the direct charge of the cabinet office put democracy itself at threat. And the sinister "war on woke", equally imported from the US, is deliberately undermining the concept of truth because the state those who support the current government want to build can only be built on lies. And of course by undermining other sources of power, whether that be the devolved governments of the nations or local councils.
Brexit never meant Brexit, it was always a proxy for a culture war. And while these aren't the consequences of Brexit, per-se, they're the consequences of the vote for Brexit and the legitimacy it gave the former "fruitcakes and loons". It may not be what Brexiters intended to vote for, but it is what their vote delivered.
Add in the economic consequences - and the apparent unwillingness of the government to even acknowledge them let alone have a plan to deal with them - and the picture is thoroughly depressing. But it's depressing enough without them.