The Duke of Cambridge and Prince Harry are visiting a new centre which is offering advice and counselling to families affected by the Grenfell disaster.
The royal brothers are to meet members of the local community and people leading the volunteer effort in North Kensington at the Support4Grenfell community hub, close to where the charred tower block stands.
William and Harry were due to be joined by the Duchess of Cambridge, but she has withdrawn because she is pregnant with her third child.
Kate, who is suffering with severe morning sickness, as was the case with her previous pregnancies, was forced to pull out of public engagements on Monday and Tuesday.
The trio are known for their spearheading of mental health causes, fronting the Heads Together campaign which encourages people to speak out about their problems.
During his visit to a nearby relief centre in the days after the June 14 fire, William told a volunteer the tragedy was "one of the most terrible things I have ever seen", vowing to return.
The Duke and his brother will hear from headteachers of local schools, charities including Place2Be, Child Bereavement UK, The Art Room and Winston's Wish, and meet some of those being helped.
They will then travel the short distance to Al-Manaar Muslim Cultural Heritage Centre, one of the first centres to open its doors to provide emergency relief during the night of the fire.
In the immediate aftermath the centre was a base to co-ordinate volunteers, food, water and shelter, and continues to provide families and residents with advice, support and counselling.
It is currently working with charities to ensure there is specialist long-term support for the community.