After the opening screen there is a lady dressed in a Rabbit costume collecting for charity. The first of the rabbit references in Utopia.
When Bejan fell onto the parking spaces outside his flat, he Lands on M13, the next two spaces in sight were M16 and M15. The font makes it look like he has landed next to MI5 and MI6, Two devisions of the British secret service.
One character is using a calculator and the number is 58008 is on the screen.
If you turn the calculator upside down the display would read BOOBS.
In the opening scene in the comic book store the yellow bag is placed on the floor and assumes the shape of a smiley face like the symbol for the Comedian in Watchmen.
Bejan falling out of the window in slow motion is like The Comedian's death in the first issue of Watchmen.