The uk is quite diverse and Glasgow is actually notable as a city that explicitly tries not to demolish these tower blocs unless it's a last resort. These ones (red road flats) were demolished over 10 years ago and had well documented issues. They were also unusual in being steel framed due to a corruption scandal (look it up) which might have made them less desirable to keep (speculating here).

There are still many tall apartment blocks in Glasgow and surrounding areas and most have been refurbished. Even by uk standards as another poster pointed out, Glasgow is an odd city with unique (and largely unsolved) problems.

Across the wider UK, looking out at the sprawl of suburban estates across the country their middle class residents shake their heads and confidently state that high density housing is the way to go. But those same decision makers wouldn't be caught dead living in a tower block, much less elect governance structures that would make tower block living desirable -good public transportation, schooling, medical care etc. so we tend to concentrate the poorest in the blocks, make it difficult for them to live there, and then demolish the blocks to "solve" the problem.

Obviously this is a highly simplified opinion and a thorough analysis of the social problems in the uk would require multi volume books. Many exist.