Clocks tell the same time - most of the time!
The time is 10.58pm in each artwork. However, it is possible to become confused when working in 3D space, so if a clock doesn’t have any numerals it is possible to place it upside down, or even at a 90 degree rotation. Have a picture that tells the wrong time? Now you know why! Oh, in case you were wondering why 10.58pm in particular - the answer is simple, ‘The night is yet young.’
Registration plates also have a purpose - sometimes they give the edition release number, so a 3rd edition of a Bristol artwork may have a registration plate ending in 03. Sometimes registrations are actual plates and have their own significance, and other times they contain cryptic comments. Belfast artworks tend to include political satire. Keith says he has lived there so long he has earned the right!