Portraits shot in an urban setting are often associated with the excellent Humans of New York series. It's unavoidable.
(I won't, but I could take the easy road and call it Humans of London)
Street portraits are a sub-genre of street photography (in street photography nothing is staged or posed).
Here, instead, I purposely asked people in the street to pose for me.
It's a bit daunting but it's also been a big eye opener in my case.