it is a busy East End district with a high proportion of immigrants and foreign workers, as it has been for at least three hundred years. They tend to move on and out as they become more settled and/or prosperous, so the population is fluid and its mix changes. it has one of the country's most diverse populations. It has less anti-immigrant and racist feeling than districts with small numbers of immigrants.
People who are not local often pronounce it Play-stow.
It's surprisingly close to Wanstead Flats (levelled by the unemployed as a form of relief) which some people mistakenly think are in Wanstead.
Depending which way you approach, you may see signs for Bow Locks, a constant source of amusement.
It's fairly handy for the old docks, where my late father used to work.
Why don't you tell us which side your grandfather was on, when the Blackshirts tried to march through the East End?