https://www.theregister.co.uk/2017/11/01/equifax_breach_uk_notification/

UK financial service regulators only learned of the Equifax mega-breach through media reports.

The admission comes in correspondence from the Financial Conduct Authority (FCA) released by Treasury Committee on Tuesday. A letter from the FCA to Nicky Morgan MP, chair of the Treasury Committee, confirms that the regulator is looking into the credit reference agency's much-criticised handling of the breach.