It’s just the very beginning of what is to be expected a mass frenzy of well-wishers.
However to prevent the same mayhem as Prince George’s birth in 2013, punters are prohibited to set up camp outside the hospital until the 33-year-old Duchess has been admitted.
But that hasn’t stopped colourful characters from donning their Union Jack garb and moseying on down for a glance.
Royal superfan John Loughrey beamed with pride as he held onto his previous memorabilia from George’s arrival.
The 60-year-old must have the patience of a saint after he camped overnight for the 2011 Royal Wedding.
Meanwhile the authorities have been busy setting up the media barricades which will soon house hundreds of journalists and photographers.
A large yellow sign also indicates a “special event” will be occurring between the 15-30th of April.
Prince William and his wife are keen to make the birth of their second child a much more low-key event compared to the intense circus with George.