BA 777 Gatwick to Mauritius makes a return to base; nothing particularly unusual about that but it was halfway there, overhead Egypt, when the decision was made. Which makes one wonder what can arise halfway through the cruise that makes one return all that way, rather than either continuing, or needing to land.
British Airways plane makes U-turn four hours into journey due to ‘technical issue’ (msn.com)
It rather gets exacerbated by being blandly informed it is a "technical issue", where unfortunately, the blander it is described, the more it appears to be something very much under the airline's control.