President Barack Obama has visited the cell on Robben Island where former South African president Nelson Mandela spent 18 years of his 27-year imprisonment.
The visit comes 15 years after Bill Clinton visited the cell with Nelson Mandela himself.
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Kate will join Prince William on a tour of the Stephen Lawrence Centre before visiting a charity working with disadvantaged young people.
There is an "urgent need" for a "simpler and more trusted" system for investigating clinical failures, according to a damning report.
Over 100 mothers and fathers were investigated for leaving their children unsupervised in the final three months of 2014, new figures find.