That Waitrose has been there since before the night rides to the coast started!
Yes, it was there when I left Streatham and moved to Croydon almost three years ago. Before that it was a Morrisons (iirc). Clearly on an actual FNRttC, people are still busy watching the ride rather than looking around at that point!
It was a Safeway when I worked in Balham, 92-95 as I recall.
...and Safeways were bought by Morrisons and most of the shops eventually rebranded, so I was probably correct as recalling it as that.