What we know so far

Heathrow Airport closed due to a fire at a nearby electrical substation, causing significant disruption with over 1,300 flights affected. The closure was prompted by a major power outage at the airport, with back-up systems taking time to kick in. The airport will remain closed until at least 23:59 on 21 March, with passengers advised to contact their airlines for further information and to expect significant disruption in the coming days.

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