For about a year now the Care Quality Commission has been running a campaign to encourage people to report poor care to them.
The CQC is the inspectorate for the following areas:
Care homes
Hospitals
Services in your home (Home care services)
Doctors/GPs
Dentists
Clinics
Community services (care, support and treatment for people with learning disabilities, acute or chronic conditions, mental health needs or substance misuse problems.)
Mental health services
They are not the inspectorate for:
CHC which has it's own standards and complaints system.
Nor Adult Social Services which is overseen by ombudsman.org.uk/
The infographic in the link below shows the effectiveness complaining about poor home-care and other services (Care Homes, Nursing Homes).