You might have been thinking of Birmingham, UK's second/ third city. If you want one place that was absolutely mulleted by postwar planning it's here, that's a far better example. The tower in the park idea was a big thing for the housing.
...but fast forward another 50 years and the 'estates' are largely gone and filled in with density, as has been replicated for thousands of sites around the country -Birmingham alone took down 300 highrises by 2010.
It's still pretty dense despite the modernism, and a lot has been repaired
The Greek temple on the left was rebuilt entirely:
On the ground it still has a semblance of the older city it was before:
https://www.ecosia.org/images?q=birm...11B1E9046F8CCE
The burbs though are a shitehole (and were before the war too, being a largely industrial city)
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