An NCSC spokesperson said:
“We are aware of this issue and are working with the Labour Party to fully investigate and mitigate any potential impact.
“We would urge anyone who thinks they may have been the victim of a data breach to be especially vigilant against suspicious emails, phone calls or text messages and to follow the steps set out in our data breaches guidance.
“The NCSC is committed to helping organisations manage their cyber security and publishes advice and guidance on the NCSC website.”
Further information