Have framed copies of Poster 1-80 (Be Safe - don't assume CHECK! - Tennis player) and Poster 1-84 (When stretched Dont forget the basics) in front of me as I write (just retrieved them from the guest loo).
The tennis player pic is courtesy of Athena International and I remember it being sold as an 'arty' poster long before DFS used it. As such the pic is almost certainly taken in the USA and looking closely it definitely is a bird!
I got the posters from IFS who were just down the corridor in Ad Astral where I worked at the time. The posters had been banned by then and the tale that I got was that the DWRAF at the time took umbrage.
What goes around comes around as they say and now my new girlfriend has said that she doesn't like them, they could be offensive, and could I please take them down!! Waaaaahhh!!