United Kingdom | Customers should expect delays

Update : Royal Mail has shared that Heathrow Airport is closed until 23.59 on 21 March 2025, owing to a fire at a West London electrical substation and ensuing power outage that has left the airport without electricity. Royal Mail is taking the necessary action with regard to carriers and airline sheds. However, this event will affect all import and export mail flows through Heathrow on 21 March and over the coming days.

Following the resumption of operations, Royal Mail expects there will be impact on mail processing for 24 to 48 hours while the backlog at Heathrow Airport is cleared.

Royal Mail’s London Air Mail Unit, International Logistics Centre, Heathrow Worldwide Distribution Centre and Coventry facilities remain fully operational. News reports indicate the airport could be closed for days and that Heathrow’s closure is impacting airports and airlines worldwide as cancellations and diversions ripple throughout the industry.