Well its almost certain that - This is an air gapped environment with effectively a unidirectional flow of software bits into the place at infrequent intervals

Well its almost certain that - This is an air gapped environment with effectively a unidirectional flow of software bits into the place at infrequent intervals - Only cleared UK personnel operate it and the regular AWS workforce has no access except for escorted sessions in rare cases. - No data leaves, i.e. not even operational logs etc That's the standard for such installations.