Kate, 31, was spotted on the King's Road and at Sloane Square where she popped into the Gap, a fellow shopper says. So what was she eyeing? Stretchy tight-fitting jeggings, according to the shopper.
"She was looking for jeggings, which are jeans that look like leggings, as she said she liked very skinny jeans," a source says. "She didn't buy anything as she couldn't find the right leg length."
Kate, who was wearing a shawl, also stopped by a favorite sandwich bar, Pret A Manger. "She sometimes comes on weekends with a friend to get a coffee," a source says.
She and the rest of the royal family welcomed brother-in-law Prince Harry back from Afghanistan on Wednesday and, after the helicopter captain had reported to his base RAF Wattisham, he has been discharged to go on post-operational leave. Kate and Prince William are likely to be spending time with him this weekend.
Kate, who was struck by severe morning sickness in the early days of her pregnancy, has been getting stronger with each day and is now in her second trimester. The baby is due in July.
Kate has been splitting her time between her family home in Bucklebury, her digs at Kensington Palace and her and husband William's main home in north Wales.