1. gov.uk’s DNS server used to point charts.dft.gov.uk to something legitimate 2. Someone hacked gov.uk’s DNS server, and changed this one specific domain to CNAME charts.dft.gov.uk.s3-website-eu-west-1.amazonaws.com 3. That same someone set up their porn thing at AWS in a bucket that maps to charts.dft.gov.uk.s3-website-eu-west-1.amazonaws.com