Detroit is known as a place with lots of abandoned buildings and I don’t think something similar exists in the UK. There are poor regions but AFIAK they don’t look like Detroit. Many high street shops are closed but it doesn’t mean that everything is bad. High street shops were hit hard first by COVID lockdowns then by high inflation (people can afford less) but rents continued to be high. It sad to see a row of boarded shops but it’s not everywhere and eventually landlords probably will reduce rent prices.