I got to say they missed a golden opportunity in the 4th episode to educate...
people that the British royal family doesn't live off the taxpayers, but a small part of the revenue generated by the Crown Estate that they turned over to government control in exchange for the civil list in perpetuity. After decades and decades of begging from Parliament to do so. After which of course, Parliament often mean-spiritedly pretended like the civil list was charity.
It actually pissed me off from a realism standpoint that they made it seem like they lived off the generosity of Parliament rather than income from the Crown Estate.
That's why the monarchy will never be abolished. Because of all the legal complications surrounding the Crown Estate that they would rightfully demand be returned. And even if the government stole it in a Marxist nationalization led by someone like Corbyn and a corrupt court ruled in the government's favor, they would still have to pay about the same, probably more with the usual government bureaucrats in charge, to maintain the royal properties. And that's after the biggest legal battle in British history where an unpopular Parliament would have to rally the public to the cause of breaking centuries of legal agreements and robbing Britain's royal family of their property and chattel.