Joe Smith & Carrington Walker A flight from Heathrow Airport was forced into a rapid descent after the crew detected an unusual smell in the forward galley. The odour prompted the pilots to declare a mid‑air emergency on Monday evening (April 6) as Flight LX325, a Swiss International Air Lines (SWISS) services bound for Zurich, was diverted shortly after take‑off, making an unscheduled landing as a precaution.