Look very carefully at what the entry requirements say. For example, Manchester explicitly excludes functional skills qualifications. If your chosen university says the're accepted, they're accepted.
As @SometimesRavenSometimesParrot says, though, many midwifery courses specifically ask for relevant work experience and understanding of the roles & responsibilities of a midwife. Again, this is the information for Manchester:
Work experience from a range of different areas is relevant, particularly experience involving the use of communication and customer service skills. Current students have also found a variety of hospitals, care homes, Sure Start Centres, voluntary settings and charity organisations that support women and families to be suitable opportunities for work experience.
We recognise that it can be very difficult for you to gain work experience placements in midwifery settings; therefore, this is not a requirement for a successful application. However, we do expect applicants to have worked hard to develop their understanding of midwifery through independent reading, talking to midwives and exploring service users' views.
Midwifery is a very popular degree and there is a limited number of places, so you need to be able to make your application stand out. Usually, once you meet the published qualification requirements, selection will be based on presenting evidence of understanding what midwifery involves and demonstrating that you have the necessary interpersonal skills. I haven't observed one, but I would guess the interviews are fairly rigorous.