British scientists granted permission to genetically modify human embryosIn other words, the humans here will be modified to see if it kills them or lets them live better. Since the "scientists" don't know what will happen, then they could develop grotesquely badly formed humans, and they will then presumably kill them. Comparisons to Mengele are merely in degree, not in type. And it's all done in the name of "benefit to humanity".
The scientists want to deactivate genes in leftover embryos from IVF clinics to see if it hinders development.
This is permitted under Leftist Atheist moral principles which dominate Britain at the present. Consequentialism is purely Atheist in nature.