Fix has already been applied. Might take some time for things to get back to normal since this was a global outage. 

On Tue, Jun 8, 2021, 8:24 AM Tony McCrory <tony.mccrory@gmail.com> wrote:
Affected for example:-

theguardian.co.uk
nytimes.com
fastly.com 

All return 503 Service Unavailable from Varnish Cache

Tony