Who is Carlo Acutis, the computer prodigy who died at 15 and is to be first millennial saint?

Pope Francis has attributed two miracles to the London-born teenager, who built websites for church and died of leukaemia

He was a London-born teenager with leukaemia who spread his faith by building websites, later gaining the moniker God's influencer".

And now Carlo Acutis, a computer prodigy who died at the age of 15 in 2006, will become the first millennial canonised by the Catholic church next week, in St Peter's Square.