You asked

I would like to know the number of live births at individual NHS hospital sites, in the UK, from 2017-2018

We said

Thank you for your enquiry. The information you requested is not available as we do not hold the number of births by individual NHS hospital site. The most detailed geographies we hold are in this NOMIS dataset.

However, we may be able to create what you have requested, or something similar, as a bespoke analysis. Any such analysis would be outside of the Freedom of Information regime and would be subject to legal frameworks, disclosure control, resources and agreement of costs where appropriate. If this is something you would be interested in, please contact vsob@ons.gov.uk, for any births related enquiries, so that we may discuss your enquiry further. For more information about the services we offer please visit our website.