A world-leading Catholic bioethical institute has severely criticised proposals to radically deregulate destructive experimentation on human embryos.

A consultation by the Human Fertilisation and Embryology Authority (HFEA) proposes the abolition of the 14-day upper time limit on experiments on foetuses and human-monkey hybrid embryos conceived outside the womb.

The regulatory quango also wants to permit the creation of genetically-modified babies by legalising germline genome editing for reproduction.