The only KP floor plans that I've seen are not that detailed (ie. not labeled with room names), but they are easily accessible on the web. Simply Google "Kensington Palace floor plans" and you'll find the same ones that were posted earlier on the forum. Here, for example.
https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRcI8xqCXcn5PtxvEr1zyj9bMB4L_N6qNR7NjhS0_JK-BinAE8c6AThis link goes to another royal forum that shows pictures of Apartment 1a.
http://royaldish.com/index.php?PHPSESSID=65cpjgc7d1se5k75fdbpot6t11&topic=9650.0Originally, Apartment 1 extended the full length of the Stone Gallery and included the further wing along the west side. This is when it was the home of the Duke of Sussex and later Princess Louise and her husband, the Marquis of Lorne.
After Louise's death in the 1930s, the apartment was divided up into two. The west portion (Apartment 1) eventually became home to the senior / late Duke and Duchess of Glouchester, while the Stone Gallery portion (which had been badly damaged in the war and sat empty for years) was redone into a home for Princess Margaret.
