Pippa Middleton headed off to work in London this morning, and left afterward with a quilted computer bag in hand. She was once again rocking a springy top as temperatures in the city climbed to the mid-60s, though she added her own flair with a pair of strappy leather boots. Pippa left the office for a lunch date with friends yesterday at Harrod's, and she made some sartorial waves in a denim-on-denim look. She's back to her workweek routine following a quick trip last weekend to Spain with her ex, George Percy, an aristocrat in line for the Duke of Northumberland title. Her schedule also allows for weekly exercise sessions. Pippa Middleton is a big fan of Pilates, and some credit the practice for keeping her in such amazing shape.