Air France flight #AF1817 from Dublin to Paris CDG is declaring an emergency.
The flight took off from Dublin at 18:08 IST and was expected to land in Paris at 20:15 CEST.
While cruising at 35,000 ft, the crew declared an emergency West of London.
UPDATE #2 18:59 BST The aircraft (reg. F-GKXN) has landed runway 27L.
UPDATE #3 The plane was met by fire trucks on landing.
UPDATE #4 The A320 is now isolated South of the airport, near the terminal 4.
UPDATE #5 We have confirmation that pilots reported smell of fumes in the cockpit.
UDPATE #6 Passengers have been disembarked.