Putney - there's loads of shops of all kinds, I just really don't know where I'd go to find flour beyond obviously the supermarkets. The local corner shop doesn't have any (though it does have, and always did have, toilet paper). Possibly something over in Fulham? Don't know the area there as well.
I'll do another google / map search. I know of one Italian deli over in Fulham, but I'm pretty sure they at least didn't visibly sell any flour (last went before the pandemic though, so wasn't looking out for it as much).
Putney - there's loads of shops of all kinds, I just really don't know where I'd go to find flour beyond obviously the supermarkets. The local corner shop doesn't have any (though it does have, and always did have, toilet paper). Possibly something over in Fulham? Don't know the area there as well.