British Airways B772 near Brussels on Jul 20th 2014, standby speed indicator failure

A British Airways Boeing 777-200, registration G-VIIG performing flight BA-133 from London Heathrow,EN (UK) to Jeddah (Saudi Arabia), was enroute at FL370 south of Brussels (Belgium) when the crew decided to return to London. The aircraft initially descended to FL340 and landed safely back in London about 70 minutes after departure.

A passenger reported the crew informed them the backup speed instruments had failed prompting them to return to Heathrow. The flight was cancelled, they have been rebooked onto the flight BA-133 the following day and are currently estimated to reach Jeddah with a delay of 24 hours.