Anyway is the olive story true or is it an urban legend?
It's a true story.
The airline business is cyclic and the cycle is usually 5 years. Every 5 years we would go on a save weight onboard exercise - once involving the entire company in a suggestion process. It's amazing how saving weight can save money. The trick is to not let good customer service get bashed by it. (if you care about customer service that is).
I have generally stuck to my own airline for most travel and the food is almost always decent with one notable lav scramble incident.
Out of the UK I always bring two bacon sarnies with me for the hell of it and always enjoy them.