Flight Radar 24 said flight BY6601/TOM4JH has declared an emergency and is returning to Majorca.
The flight was scheduled to land at Exeter Airport at 2.20pm BST.
The plane was near Barcelona when it turned back to Palma.
According to flight radar, the jet landed in Majorca just after 1pm BST (2pm CEST).
This is a breaking story. More to follow…