This is an original poster by British artist Martin Creed.
This is a rare poster of the London Olympics in the UK, sold in limited quantities and not available on the market. This is not an aftermarket or print, but a genuine authentic product.
Work No. 1273 (2011)
Martin Creed 
Limited edition of 2012
Size approx. 31.5in x 23.6in
Purchased from the official website at that time.
There are some deterioration, warping, yellowing, stains, and tears due to age.