A black reverend ambushed the Prince and Princess of Wales at their Earthshot launch event today by making a lecture about the 'legacy of colonialism and racism' - just hours after Buckingham Palace became embroiled in a furious race row when William's godmother was accused of making racist remarks at an event hosted by Queen Consort Camilla.

Just minutes before William and Kate took to the stage at the Boston launch event of the Prince's Earthshot Prize, Reverend Mariama White-Hammond - the city's Chief of Environment, Energy, and Open Space - gave a strong speech in which she told the crowd to 'consider the legacy of colonialism and racism'.

As the Prince and Princess Wales watched on from the wings, Reverend Hammond, who founded a youth organization focused on 'teaching the history of the Civil Rights Movement', said: 'On this day, I invite us all to consider the legacy of colonialism and racism.'

She continued: 'The ways it has impacted people across the world and its connection, its deep connection to the degradation of land and our planet that we are all seeking to reverse. The stories lost, the species made extinct, but also the persistence of people in the face of oppression and the fundamental dignity of all of our relations.'