The Home Office and Downing Street were told in 2016 about problems faced by the Windrush generation, the BBC understands.
They were alerted after the Barbados Laura Kuenssberg said:
Labor has urged Home Secretary Amber Rudd to quit over the Windrush saga.
Ms Rudd told MPs she "bitterly regretted not recognising the" systemic ". problem sooner.
The Windrush cases ̵
Their plight has been criticized for Prime Minister Theresa May's apologizing for their treatment.
In April 2016, Philip Hammond – who is now chancellor secretary – told what by Caribbean ministers about immigrants facing deportation despite having lived in the UK for the most of their lives, and the BBC understands their report on their home office.
It is not clear at what level the concerns were raised.
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The government has set up a task force to help them deal with their status.
So far 3,800 calls have been made to The helpline, which were 1,364 were potentially Windrush cases, MPs were told on Wednesday.
Ms Rudd told the Commons Home Affairs Committee that they had been told about the problem for several months their supposed immigration status.
"I look back with hindsight and I'm surprised I did not see the shape of it sooner," she said. "I bitterly, deeply regret that I did not see it as more than individual cases that I have not done wrong yet."
The issue dominated Prime Minister's Questions in the Commons, with Labor leader Jeremy Corbyn urging Mrs. May to abandon the government's "cruel" immigration policy and abandon "bogus" targets.
Mrs May rejected claims she was "ignoring" the Plight of the families of Caribbean migrants who had their residency rights questioned, repeating the government's promise they and others from the Commonwealth nations who came between 1948 and 1973 19659005] But they said that they should have been legally settled in the UK.