BA source has changed their story now to a more accurate one .....
British Airways Boeing 777-236ER G-VIIH operating yesterday’s delayed BA632 London Heathrow – Athens as BA82GD encountered a techical issue with the #2 engine shortly after take off, climbed to 5,800ft above Kent and entered a hold to work checklists then returned to London Heathrow for a safe landing. The aircraft flew with gear down throughout.