The weird bit is that the UK is the inbreed/incest hot zone of Europe:

"It is estimated that approximately 55% of marriages within the Pakistani community in the United Kingdom are between first cousins. This practice, often referred to as consanguineous marriage, is culturally favored within certain communities, leading to higher rates of inbreeding coefficients, which can be comparable to those found in other regions with high rates of cousin marriage, such as in the Middle East."

The UK refuses to make it illegal. That would be racist. The worst crime ever.