Midwives have been told about the benefits of “close relative marriage” in training documents that minimise the risks to couples’ children.
The documents claim “85 to 90 per cent of cousin couples do not have affected children” and warn staff that “close relative marriage is often stigmatised in England”, adding claims that “the associated genetic risks have been exaggerated”.



I wonder where this 15% figure comes from. All the research I can find estimates the probability for these disorders at around 2-4% for first degree cousins. This is about the same as becoming a mother at 40 with a non-related man.
The article only talks about some NHS training documents and is very opinionated in style. Smells like a snappy headline about a controversial topic was more important than proper research.
Plus in the absence of any power dynamic* why shouldn’t absolutely anyone be allowed to choose to be in a relationship with literally anyone else? Especially as people are increasingly choosing to not reproduce.