People without a home do not have access to the platforms that these seats are on. These seats are on the underground, past the ticket barriers, and they would quickly be removed for trespassing on private property, as all TFL stations are staffed.
Typically in London, People without a home would be found outside the station, or occasionally in the concourse.
Typically in London, People without a home would be found outside the station, or occasionally in the concourse.