First, can you define a footprint for the MVP, or a core area and an area that overlaps with other MVPs/maternity services?
If you know that there are some local authority areas (council footprints) that you definitely serve, start with them.
Look online for the ‘[name of local authority] JSNA’ and search through for maternity, child health, breastfeeding, mental health, smoking etc.
JSNA stands for Joint Strategic Needs Assessment.
You will find out a lot about the make up of your local population, including ethnicity groups, the proportion of parents born outside the UK, the number of young parents, etc.