The Guardian's, Dan Sabbagh, reported on the Internet outage June 7, 2021 with the headline "Internet outage illustrates lack of resilience at heart of critical services." He says, for 45 minutes the gov.uk domain was "knocked out," along with many other Internet sites. This outage affected Covid-19 test sites. His question: "who do you call when the Internet is out?" That is a very good question.
Sabbagh reported that the outage originated with Fastly, a business that provides website content services (CDN).
https://www.theguardian.com/technology/2021/jun/08/internet-outage-illustrates-lack-of-resilience-at-heart-of-critical-services
Ryan Browne and Sam Shead of CNBC provided more details on the Fastly issues. They write, "A slew of major websites including Amazon, Reddit and news publishers like The New York Times were affected by a massive internet outage Tuesday." The problems surfaced around 6am New York time, when browsing users got “Error 503 Service Unavailable” and “connection failure” messages from these popular sites. The problem is not attributed to a cyberattack, as originally suspected. The CNBC article stated "The company said in a tweet that it had 'identified a service configuration that triggered disruptions' across its clusters of machines globally." It is interesting that one configuration error can have a widespread impact on the Internet.
https://www.cnbc.com/2021/06/08/fastly-outage-internet-what-happened.html