This is ONE professor who happens to be British advocating this. America has its own fair share of scary fundamentalist lefties, I'm sure.
In any case, if you want to talk about UK and US abortion law, UK abortion law is actually a lot less liberal than US abortion law. In Britain, an abortion requires the consent of two doctors, and is illegal after 24 weeks unless there are extremely extenuating circumstances that pose a risk to the mother's health and the child cannot be removed alive without putting the mother at risk. In the US, abortion is available on demand for the whole 9 months of pregnancy.
All that said, One of the great ironies of the 1960s, in Britain at least, was that at the same time that killing unborn children was being legalised and enshrined as a right, hanging felons guilty of murder was in the process of being abolished, with the last executions taking place in 1964, with the penalty suspended in 1965, and permanently abolished in 1969...