Just seen someone on facebook post from onboard BA360 which returned to LHR this morning following some sort of engine incident.
Facebook poster suggests the cause was a piece of the wheel flying off during take-off. Only news report I can see so far is in the Sun which suggests there was an engine stall and reported ‘loud bang’ 20 mins into flight:
http://www.thesun.co.uk/news/3580153...ine-emergency/
More details will no doubt emerge in due course.