Marriage: Relatives

(asked on 28th August 2026) - View Source

Question to the Ministry of Justice:

To ask the Secretary of State for Justice, what recent conversations he has had with health bodies on the increased risk of congenital birth defects to children whose parents are first cousins.


Answered by
Jake Richards Portrait
Jake Richards
Parliamentary Under-Secretary (Ministry of Justice)
This question was answered on 8th September 2026

The Government does not collect data on the prevalence of first cousin marriage. The evidence referenced in WPQ 16079 relates to longitudinal research from the Born in Bradford programme which shows that rates of consanguineous relationships have fallen substantially over time.

As a matter of course, officials at the Ministry of Justice and the Department for Health and Social Care work collaboratively on the topic of cousin marriage, including on the risk of congenital birth defects posed to children of closely related parents.

We recognise the serious concerns that have been raised on this issue. As any responsible Government would do, we will be considering all options on how to tackle first cousin marriage.

Reticulating Splines