TUI holidaymakers heading home to the UK had to return back to Spain following an onboard emergency. Spanish air traffic controllers facilitated the Boeing 737's unscheduled return yesterday afternoon to Tenerife after being contacted by the pilot, with the plane en route to Glasgow . The incident happened a day after an easyJet plane on route from Glasgow to Jersey declared an emergency and was forced to return to the airport it had just left from after experiencing turbulence which resulted