"It's not a matter of the heart, it's a question of reason"
Former French Socialist Prime Minister
"The European Union is not going to survive"
Former UKIP leader
"We have to adapt and we also have to take our own responsibility but it is up to the politicians, to those who have political responsibility to create an environment to make that possible"
"Even the SNP are uncertain about which way to go with regards to Europe"
Lecturer at Edinburgh University
"June 23 was not the moment Britain chose to step back from the world. It was the moment we chose to build a truly Global Britain"
British Prime Minister
"Is there anyone that believes that North Korea would agree to a ban on nuclear weapons?"
US ambassador to the United Nations
Flight delays: the causes and solutions
Brian Flynn, Head of Performance, Forecasts and Relations Unit from EUROCONTROL, explains what causes delays, and what is done to try and combat them.