Thank you Grog. I thought that this was a very rare occurence - the crash of Air France Concorde Fight 4590 came to mind.
No reasons for the incident have been reported, just a rumour of possible loose caulk, but no confirmation. I also could not understand that the press said no 'jet flights' were affected, but 6 incoming turboprop flights were diverted (plus the A380) and four outbound turboprop were delayed, plus re-scheduling. How can 'jet flights' not be affected with their longer tak-off and landing runs and not turboprops? Perhaps it's a case of don't always believe what you read in the papers!
Might it be the schedule at that time of day?