Mistakes like this should bring down governments.
My dad was a specialist in aviation disaster litigation back in the day.
The safety margin is not all that wide when you're talking about debris in the air. Sometimes you have to make a judgment call, and people are only screaming about being stuck abroad because we didn't have multiple engine failures from ingestion of ash.
It just might. There is a general election next week. And lets just say the Labour government isn't looking forward to it.