No I think we're both correct - sorry, I didn't explain myself properly! I agree with you that it was definitely still banned for implantation.

But by having that clause about mitochondrial disease in, it enabled researchers to investigate (and the the HFE Authority to permit research on) human mitochondrial transfer techniques in vitro by explicitly pointing out the possibility of a future redefinition.

EDIT: this explains it much better than I'm trying to - http://www.hfea.gov.uk/mitochondrial-disease-new-research.ht...