As part of our week-long series on homelessness, Hayley spoke to one young man about what life is really like living on the streets.
Tom (not his real name) left home when he was 16 years old. He's now 20 and is still technically homeless, relying on a hostel in London to keep him safe at night.
Tom managed to survive the long cold nights and days on end without food, but he wouldn't advise anybody else to do what he has done.
Watch the clip to find out more about Tom and his life on the streets.