Thatcher left power in 1990 and since her time there have been governments from both major parties as well as considerable reform and changes to the laws governing the financial markets. She at most set the seeds for the financial crisis but if we are to blame her for that then we must also praise her for the Big Bang and the almost unprecedented wealth it brought into the UK in the years prior.
The "Big Bang," like early nineties prosperity across the pond (or indeed the pre-Depression "roaring Twenties" at the end of the first Gilded Age), was a false dawn in a general Western economy whose fundamental safeguards were already being fatally undermined by Eighties excesses. It would only be really worthy of "praise" if that had not been the case. Changes post-Thatcher in Britain, and post-Reagan in the States, simply tinkered with the trend toward catastrophically unregulated markets they had already established. It was that trend that ultimately proved disastrous. I wouldn't say they "at most" set the seeds for the financial crisis, but that they and the entire movement of globalist neoliberalism for which they were standard-bearers most certainly and demonstrably did.
(This trajectory was less clear in post-War Britain, which didn't enjoy the prosperity of post-War North America. On the other hand a lot of what Labour and the left accomplished in post-War Britain to ameliorate the loss of empire and very difficult attendant circumstances is now entirely taken for granted in or conveniently written out of the Thatcherite narrative of events. That's a key part of the myth of the Iron Lady, a part of it which needs to die.)
I wouldn't say that Unions are gutted in the UK.
Then we shall have to agree to disagree.
You're still to say how preventing unions from forcing the country to a three-day week (as happened in the mid 1970's) was her "screwing the working class"
Heath's government "forced the country to a three-day week" in the mid 1970s, and deservedly lost the subsequent election. I'm suspicious of any narrative of the history of trade unions which assumes it was outrageous for them to ever exercise their power or win any confrontation ever. That often bespeaks a mindset -- it certainly did in the case of Thatcher -- whose real problem is the idea of the working class having political power and collective bargaining clout of any kind at all.
Thatcher declared unions "the enemy within," which was about rather more than just staving off the three-day week, and I've already spelled out quite clearly the relationship of that to an assault upon the idea of anything more than an attenuated middle class from which the working class is excluded by union-busting policies.