This brings back memories of commuting to school from Orpington to London Bridge in the mid 1960s. The smell of the biscuit factory was mostly of custard creams, but none of the other smells were so pleasant. The school was on the corner of Tooley St and Tower Bridge Road, so we had smells from the Sarsons factory to the south, the Courage Brewery to the east, and the even more pungent leather works on the walk through the backstreets to the Grange Road baths for swimming lessons. I have avoided vinegar ever since.