Thanks Slowhatch! Here's Leg 11: London.
The route for the cab ride shown on TV wasn't 100% correct; teams turned West on Courtfield Rd and returned East on Harrington Gardens, instead of turning West on Harrington Gardens and back East on Old Brompton Rd. This means a couple of landmarks on the route, like the Bentley Hotel, were also mislabelled.
The reason why the rug was so hard to find in Camden Market is that it's on a different side from all the other items; a logical route would allow you to pick up the 7 other items easily, but you'd need to return to the start and go in the opposite direction to find the rug.