I moved to Forest Hill originally in 1979.
There were two butchers, Wests (now William Hills) and Dewhurst (now The Big Breakfast). The fishmonger was where the Red Cross shop now stands although at one point I believe it was the original Sainsburys. Pizza Hut replaced a coffee bar that sold coke floats- in sundae glass on a plate of course! We also had a Tescos (when it was a failing brand) where Paddy Power is now. Don't remember a deli but there were also 3 or 4 greengrocers and 2 shoe shops.
Point is they have all sadly all fallen victim to the inability to compete with the big boys.
The use 'em or lose 'em slogan really does apply...