take a listen to what barbara isaacs has to say. >> we're not wanted here. that's the way they make me feel. i'm not wanted. i'm not valid. i'm not nobody. i have no identity. as far as they're concerned, i'm an alien. >> barbara isaacs says in 2008, her life forever changed. a mother of six struggling with mental health issues and living on benefits, she applied to the british government to renew her welfare, something she received for decades. only to suddenly be told there was no record she existed. >> how can you throw away a whole generation of people that you invited to come here? >> arrival of more than 400 happy jamaicans. >> reporter: barbara is part of what is known as the wind rush generation, a wave of migrants from the caribbean encouraged to come rebuild the uk after world war ii. they were told they could stay for the rest of their lives. many lived in the uk without paperwork. decades later, the government would begin to demand documentation to prove their right to stay. documentation many say they don't have. to make matters worse, the briti