UK security chiefs issue guidance to ministers over hackers on WhatsApp

Exclusive: civil service chief points to work to improve cybersecurity in response to Labour concerns

Ministers and civil servants conducting government by WhatsApp" have been at risk of being targeted by hackers, leading to new advice from security chiefs about how to improve their privacy.

The cabinet secretary, Simon Case, revealed that the Government Security Group had issued fresh guidance across government in a letter to Labour, which had raised questions about ministers using their personal phones to conduct official business.