More than 300 members of GMB, the union for hospital staff, will strike at multiple hospital sites across South London this winter.

More than 300 members of GMB, the union for hospital staff, will strike at multiple hospital sites across South London this winter.

Porters, cleaners and caterers employed by outsourcing giant ISS will take four days of industrial action from the 29th.

Hospitals affected include Croydon and South London and Maudsley.

The dispute centres around concerns including pay, excessive workloads, staffing cutbacks and management bullying.