You can see who signed the letter here: https://www.gov.uk/government/publications/ministerial-letter-on-cyber-security-to-leading-uk-companies/ministerial-let

You can see who signed the letter here: https://www.gov.uk/government/publications/ministerial-letter-on-cyber-security-to-leading-uk-companies/ministerial-letter-on-cyber-security https://www.gov.uk/government/publications/ministerial-lette... None of the signatories are specifically involved with the nascent digital ID scheme, as far as I know.