Here are a some more Site Footnotes. Although this time a couple of scenes featuring actresses who have since trumped these moments in other productions.
Alice Eve in Poirot: The Mystery of The Blue Train, from 2006, has a quite revealing-seeming moment when she jumps onto the back of a night-time intruder while wearing a dropping nightdress. She has since appeared properly topless in the 2009 film Crossing Over.
Laura Haddock in the 2007 Comedy Showcase pilot for Plus One as she is rising from a sofa. She has since appeared properly topless in the TV series Da Vinci's Demons.