The Care Quality Commission (CQC) is the independent regulator of health and social care services in England. They are responsible for inspecting, regulating and registering services to make sure they meet certain standards.
The CQC provides a range of information about their work for the public, including how to make a complaint about a service, what to do if you're worried about care quality, and what you can do as an employer or service provider.
You can search your city or postcode to find all services in your area. This is the link for hospital search tool: https://www.cqc.org.uk/search/services/hospitals
This shouldn't be the only thing you judge on your hospital. For us the main thing was how we felt during routine appointments before the birth. If you feel happy then that is the best bet.