The Queen and Prince William are visiting a relief centre helping victims of the Grenfell Tower fire.
Their visit to the Westway Sports Centre comes after police say some of those killed in the fire at the west London flats may never be identified.
The BBC understands that at present there could be as many as 76 people missing as a result of the blaze.
Seventeen people are known to have died in the fire which broke out shortly before 01:00 BST on Wednesday.
The Queen and Duke of Cambridge are expected to meet volunteers, local residents and community representatives.
The Queen paid tribute on Thursday to the “bravery” of firefighters the “incredible generosity” of volunteers now offering support.
Emergency services are to spend a third day searching for bodies in the burnt-out Grenfell Tower in North Kensington.
Fire chiefs say they do not expect to find more survivors, while PM Theresa May has ordered a full public inquiry.
Police said on Thursday that they had launched a criminal investigation into the fire.
The prime minister – who faced criticism for not meeting survivors of the tragedy on a visit to the scene on Thursday – said the victims “deserve answers”.