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Guidance to consumers impacted by Heathrow Airport incident– 21 March 2025

Heathrow Airport is closed today due to a fire at a nearby electrical substation, affecting the supply of power to its terminals. Unfortunately, this means that today’s flights to and from the airport have been cancelled. The knock-on effect may also lead to delays and further cancellations over the weekend.

Aviation Regulatory Library

The Aviation Regulation Library contains the up to date consolidation of the individual Regulations, Acceptable Means of Compliance (AMC), Guidance Material (GM) and, where appropriate, Certification Specifications (CS).

This consolidated material is available in two formats, as a webpage, with expandable elements of the regulation, AMC, GM and CS, and a PDF document, which sets out regulation with corresponding AMC, GM and CS in sequential order.

As these consolidations are published separate links to each regulation and its respective AMC/GM/CS will be replaced by a single link to the Aviation Regulatory Library.