My resarch about those Victorian satin buttoned boots didn't pay off I'm sorry, FIMP

And as for her newly worn jersey tees/doublelayered tee I'm no help either, hah!
On another note, I may have found out the designer behind the gorge waistcoat Kate wore back in 2005.
It looks extremely similar to the Pinko one shown in a french Vogue spread.
http://www.pinko.it/

I used to think it was Cavalli but now not so sure..
