This Elizabethan collar, or more specifically, Whisk, was made for the production The Virgin Queen
, in which all of Anne Marie Duff's costumes were custom made for her. It went on to be used again in 2007 in Doctor Who
and on Rupert Everett in St.Trinian's.
Interestingly, this is not Everett's first appearance on this site in drag
. The collar was used again in an ad for LKXA Youth Bank. Click on the ad to see it at full scale. The collar was most recently spotted again in 2013 on Beyonce in an television ad for O2 Priority, which you can view here.