Gavin Grey: UK Correspondent on Heathrow Airport closure, former Scottish leader no longer under investigation, Finland world's happiest country for eighth year - Heather du Plessis-Allan Drive

London's Heathrow airport is closed after a major fire at an electrical substation caused a power outage.

120 flights were in the air and had to be turned around or diverted.

Heathrow is Europe's busiest airport. 

UK Correspondent Gavin Grey talks to Ryan Bridge about the shutdown, why former Scottish leader Nicola Sturgeon's no longer under investigation, and Finland's ranking as the world's happiest country. 

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