Sajid Javid has become the UK’s first home secretary from an ethnic minority background after Amber Rudd’s exit.
Mr Javid, the son of a Pakistani bus driver whose family came to the UK in the 1960s, had been communities, local government and housing secretary.
Ms Rudd quit after she said she “inadvertently” misled MPs over what she knew about immigration removal targets.
Labour’s Diane Abbott said Ms Rudd had “done the right thing” in quitting.
Ms Abbott added that the “architect of this crisis” – the prime minister – must come before the Commons to explain “whether she knew that Amber Rudd was misleading Parliament and the public last week”.
Ms Rudd’s departure came after she faced mounting criticism over her handling of Windrush scandal and immigration policy.
The Windrush generation settled legally in post-war Britain but their right-to-remain has been questioned, with some people having been detained, lost their jobs and been denied access to medical care.
This has prompted calls for the government to abandon its “hostile environment” policy on illegal immigration, which Ms Rudd and Prime Minister Theresa May have continued to defend.