Jet2 flight from Birmingham to Dalaman has declared an emergency and now heading to Luxembourg.
While cruising at 37,000 feet over France, the crew declared an emergency (squawk 7700) and requested an emergency landing at the nearest airport.
The flight, operated by a Boeing 737-800 (registration G-GDFD), was vectored to Luxembourg Airport.

UPDATE 18:15 CEST
The jet2 flight is landing soon at LUX airport during intense rain.
UPDATE 18:18 CEST
The Boeing 737 has landed on runway 24.
UPDATE 18:20 CEST
The aircraft vacated the runway but was met by fire trucks after landing.
UPDATE 18:51 CEST
The Boeing 737-800 G-GDFD is still stuck on taxiway and surrounded by firetrucks after emergency landing in Luxembourg.
UPDATE 21:06 CEST
According to The Aviation Herald, the crew reported smoke into the cockpit that expanded into the cabin. Passengers disembarked onto the taxiway via stairs.