GOV.UK aren't quite yet entirely on AWS but are working toward that end. With GOV.UK, all the code is in the open where possible (https://github.com/alphagov/govuk-aws and https://github.com/alphagov/govuk-puppet respectively for the infrastructure).
Source: I used to work at GDS.
GOV.UK aren't quite yet entirely on AWS but are working toward that end. With GOV.UK, all the code is in the open where possible (https://github.com/alphagov/govuk-aws and https://github.com/alphagov/govuk-puppet respectively for the infrastructure).
Source: I used to work at GDS.