Londoners told to be vigilant with messages after cyber-attack on council

Three London councils have been affected by cyber-attacks this week. Photograph: Cavan Images/Alamy

A London council has urged thousands of residents to be “extra vigilant” when receiving calls, emails or text messages after confirming that data had been taken in a cyber-attack.

The Royal Borough of Kensington and Chelsea (RBKC), which has 147,500 residents, said some data had been copied from its systems in an attack this week.