Parshotam said they had chosen to go down to the hospital that night and wait because it was a full moon. "We took a guess", he told the Evening Standard. "It was a full moon so we thought why not come down? We stayed there from 8pm in the evening until about 5.30am.
"We were just standing outside chilling and talking and then it all happened. The cars showed up. They were very, very simple cars - it was very discreet...the protection officers jumped out and they all rushed in. It was a very swift manoeuvre. The Duchess went in and the cars were gone very quickly - within a minute. That was it."
However Parshotam said he chose not to take a picture of the Duke and Duchess emerging from the car, because she was in labour.
"We had decided in advance we were not going to take a photo of her," claims Parshotam. "I made that decision - she's a woman in labour. I just wanted to photograph the commotion and convoy of cars. That was a personal decision we both made. To take a picture of her would have been overstepping the mark."
He described his scoop as one of the biggest moments in his career as a photographer.
"All these agencies from around the world have been camped out since 1 July in some cases and we got it. I don't think it's going to get much bigger than this."
- INDEPENDENT