Pimms is a good call. I'm also betting that she's only there because she wants to check out Ute Wassermann's set in the 'Avant-Tent'.
The Wellies are a great touch, I agree. They offer that fusion of style and practically that is quintessential Roberts.
I mean, in terms of contrast, look at Harding getting the avant-festival vibe completely wrong. I'll bet Roberts is so irritated having her around, mispronouncing Einsturzende Neubauten.
