I had difficulty at first, but, as Cheryl suggested, I kept clicking on things until I was linked to more details. One of the details link brought me to a list that included House of Commons. I think I click on the map as well as words. But the best part is that clicking doesn't get you into trouble, only helps you find the links.

I hope this helps. I felt like I discoverd a gold mine when I enter into more details of London. Have fun!