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Tom Bateman visits a London apartment block with front and back entrances for private and social housing and speaks to people using both doors.

One resident, who uses the front entrance and so called 'rich door', dismissed the terms 'poor' and 'rich' doors.

"I do not think it's a valid term, a door is a door," she said.

Residents using the back entrance think it is unfair that they have to use a separate entrance and want to be treated equally.

"Where my door is is next to the rich building...I use the rich lift when the door opens and they try to tell me off," one of them told the reporter.