Badar Azim has returned to his family in Calcutta, he was a footman at Buckingham Palace and had helped display the official announcement of the birth of Prince George.
Speaking exclusively to ITV News Badar said he had been "blessed" to be a part of the royal baby announcement, and said he would love to return to the UK.
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The man, who was in his 30s, has not been identified, while several other people are believed to have suffered serious injuries.
The Olympian was one of several sports stars who opened up to the prince during an event for his mental health charity Heads Together.
There will be sunny spells, with temperatures peaking at 23 Celsius (73F). However, Northern Ireland will experience frequent showers.