the country, do we know yet any more about what has caused this? flat the country, do we know yet any more about what has caused this? about what has caused this? not as et. what about what has caused this? not as yet- what we about what has caused this? not as yet. what we know about what has caused this? not as yet. what we know is about what has caused this? not as yet. what we know is a about what has caused this? not as yet. what we know is a reduced - about what has caused this? not as| yet. what we know is a reduced flow rate is in place at heathrow airport, in simple terms, that essentially means there is a limit to the number of flights taking off and landing. we have seen reports on social media people essentially stuck on planes at the departure airport because heathrow does not necessarily have a landing spot for them. a spokesperson for british airways which is one of the main operators at heathrow confirmed there was a reduced flow rate in place. britis