So after deliberating with Rachael
wicked0witch we've figured out what skirt Amy is wearing in the 2011 Comic Relief Special.
The same skirt she is wearing in Vampires of Venice, a black Top Shop skirt Which was ID'd by
huskk a little while back. You can see the same swoop on the pockets as you do here:
in the post that huskk ID'd the skirt Rachael also wanted me to point out that this isn't the same skirt she wears in Day of the Moon or The Doctor's Wife. Hopefully this helps people out that want to do this cosplay!
Thanks
huskk for the ID and
wicked0witch for helping me figure this out!