A timeline of the Heathrow Airport disruption

Thousands of passengers around the world have been affected by the closure of Heathrow Airport for most of Friday.

The site lost power following a large fire at an electrical substation nearby.

BBC Verify's Nick Beake explains how Europe's busiest airport was taken out of action and the global impact that followed.

Additional reporting by Paul Brown, Jake Horton and Victoria Park. Produced by Aisha Sembhi & Mohamed Shalaby. Graphics by Mark Edwards.