If the Leave campaign knew that they were going to deliver something other than what they campaigned for, and it's reasonable to suggest they did, then that's fraud, and the whole thing should be declared void.
I was sure that they would make arrangements to stay in the VAT MOSS system, but no, they did not. So we had to switch to using Ireland for VAT MOSS and register separately with the UK to deal with UK VAT.
Dealing with Ireland was a breeze. It took something like 10-20 minutes online to get all set up. (Orders of magnitude easier than when we had signed up for UK VAT MOSS years earlier. Filing is also way easier with Ireland).
For the UK we've applied to be able to collect and remit VAT. We finished all the paperwork and submitted it at least 18 months ago and they still haven't processed it. They say they are busy and can't even give an estimate of when they will actually deal with it.
They say that in the meantime we should collect UK VAT and just hold on to it until they get around to giving is permission to remit it.
I'm not aware of any institutions that were left that didn't match that description, perhaps you know of some?
that was pretty difficult when none of them were in positions of power
Campaigning while knowing that you plan to do something else is different. The important thing is that you should campaign believing that you will make every effort to implement your plans, else you are defrauding voters. For example, I have no doubt whatsoever that Boris had absolutely no intention of trying to increase NHS funding despite repeated saying he would if people voted leave. That's the difference. He wasn't just wrong or incompetent or unlucky, but instead he was telling people something he knew wouldn't happen.
the government did increase NHS funding by more than the bus number (£350 million/week)
see NHS Funding Act 2020: https://www.legislation.gov.uk/ukpga/2020/5/pdfs/ukpga_20200...
(148MM-127MM) / 52 = £390M increase / week