No, this isn't about people; it is about sporting venues. I know it happens, and I know it's often done in the name of "progress", but I'm not really sure I agree with that statement. The same as in the US, so many British stadia have in recent years been destroyed, some to make way for ugly and/or dull replacements, and some to make way for housing or industrial parks. Others are still sitting there, just waiting to be redeveloped.
This is the first in a series, focusing on different sports. Going back only 40 years - to 1974 - here is a list of speedway stadia that are no more.