Jeremy Corbyn has asked Theresa May to broaden the team investigating the Grenfell tower, with an emphasis on diversity.
The Labour leader said there should be more "representation from those from minority backgrounds," according to Sky News.
The makeup of the inquiry team has come under fierce criticism, with inquiry chair Sir Martin Moore-Bick facing particular scrutiny over his wealthy background and previous accusations of social cleansing.
Moore-Bick is being assisted by a team of three experienced QCs - Richard Millett, Bernard Richmond and Kate Grange - and a former government official called Mark Fisher. All four are white.
Earlier this month, local Labour MP Emma Dent Coad suggested Moore-Bick had to be replaced, as he could not possibly identify with the victims or survivors.
"How anybody like that could have empathy for what those people have been through, I don't understand", Moore Dent told the BBC Radio 4 Today programme.
This demand has been echoed by BMELawyers4Grenfell, a team of black and minority lawyers who are supporting survivors of the tragedy.
BMELawyers4Grenfell have drawn up a series of demands, including the replacement of Moore-Bick and the creation of a diverse panel of experts to sit alongside the judge.