These are some snaps we took on our evening in London. I had resigned to the fact we wouldn't be able to get any done, then we stumbled across this arcade which was the perfect evening location! Sadly the lighting isn't great so you can't see the detail of this dress/coat thing. I bought it in COS on the same day, and I actually don't know what it is. Its a dress, with a zip, so it also a jacket. I will be wearing it as both anyways!!
Here is a long sleeved version that they have on sale! And some more affordable options from ASOS here and here
JUMPER (worn underneath): ZARA