Hey! A young lady just sitting around waiting?
She could put bag(s) in Left Luggage ( in arrivals area)... and then work her way over to the (landside before security) departures area of Terminal 3. I'm sure she'll find someplace over there where she could spend time....the shopping is not as comprehensive as after security, but there is some.... and, of course, I'm sure her wonderful Uncle will reimburse her for anything she picks up at Lush that she forgot to bring and just HAS to have.
*grin*