Triumph have had feedback from others about this issue too.
They have described the rear fender assembly as a design feature, clearly designed for fit rather than function.
This is the result of a 20 mile trip on a wet road, not raining.
After spending 21K i would have hoped for better or am i expecting too much?
Triumph needs two separate setups for the rear fender. The Hipster model has the current lack of fender. The non-Hipster model (that puts on more than 5 miles a week) has a full fender that actually keeps debris off your back.