Setchell, 69, was being assisted by Alan Farthing, 50, an expert in keyhole surgery who succeeded him as surgeon/gynaecologist to the Queen in 2008.
The world's press have been camping outside St Mary's for days in anticipation of the birth. Bored journalists had dubbed their vigil outside the hospital as “the Great Kate Wait”.
A royal aide left the main entrance of the Lindo wing bearing a typed medical bulletin signed by doctors at birth. The aide took the bulletin to Buckingham Palace by car with police outriders.