Britain was bankrupt after the Second World War (and in hock to the US for billions of dollars as well). As part of the attempt to rebuild the country a consensus was formed that the British state would step in and help people - hence the NHS, hence free school milk (as rickets was a very common disease). The unions had too much power for much of that time, but British industry also had terrible management practices so I would put both "sides" as bad as each other.

But while Thatcher shook things up and modernised many parts of the economy, she did it in an extremely divisive and many would say callous way - by devastating communities (especially in the north of England), destroying British manufacturing and putting unemployment up to 3 million (with millions more on disability, to make the jobless figures look better).

And these are legacies that still live on today - where I grew up there are still houses with barbed wire between neighbours who have lived there for years - as a result of the miner's strike. The north is still significantly poorer than the south, with much higher unemployment. The current government has just pushed through an extremely painful reform of disability allowance that appears to be punishing the genuinely disabled as much as the "skivers". And in Scotland she is so despised that you can't even say her name in public after shutting down much of the country's industry and taking North Sea oil revenue down south.

For the most part, nowadays, the question isn't whether the reforms were needed, but whether they had to be done so painfully and whether the benefits of those reforms were shared fairly. There is definitely a north-south divide within the country on that.