Family and friends were said to be amazed by his determination to carry on with business as usual . It is understood his condition has been caught very early and the prognosis is good.
The Duke of Sussex is believed to have touched down on a British Airways flight to London Heathrow - but Meghan, Archie and Lilibet have stayed at home in California.
Harry s transatlantic dash had raised hopes his return to Britain will be used to heal wounds with King Charles and a chance to reach out to his brother Prince William.