I am sure that grans have a memory of how the natural world was in our youth compared to now. My contribution is
Hedgehogs - so many wandering around in our garden during the warm summer evenings. Gone.
No longer hear the cuckoo from our home
No longer hear the Owls every night
The beach has been denuded from the miriad of species that we used to collect
The car no longer "collects" dead flies on its windscreen on long journeys
Fashion for short, overweight woman
Being quizzed by chemist's assistant in Boots.
To think that London, or anywhere else for that matter, does not belong to any one demographic