I think this debate has massive ramifications, though. Firstly, you can only force abortions for DS if you force women to undergo screening for DS. Under the European Convention of Human Rights, you have a right not to know. Of course, UKIP would take us out of Europe, but the point still stands, it is a fundamental human right not to know. So, there is a broader issue, because if the state overrides that right, that affects everyone, not only pregnant women.
Secondly, testing for DS is an invasive procedure, either amnio or CVS, so this policy would effectively force women to undergo invasive procedures with a risk of miscarriage.
Thirdly, at the moment this applies to DS, but we are a hop and a skip away from being able to map the human genome of fetuses, if we can't do that already, and it will then be possible at some point to screen for any number of conditions. Quite aside from UKIP, this will result in more terminations.
So yes, the comparison a previous poster made with the Nazis and UKIP is correct. But the point about the murder of many disabled babies and children is that the parents asked for it. The first baby killed, the father wrote and asked Hitler to allow his son to be killed. The baby was five months old, if I remember correctly. Some parents, some doctors tried to save disabled babies who were to be sent to the killing centres, others did not. In a context of no support for disability and huge social stigma, is this an understandable decision or abhorrent?
I am not drawing a direct comparison between then and now, before I am pounced upon, but I do think wips has a point, if I understand her correctly. Namely, the more society narrows the definition of normal, the more people, or fetuses, will be classified as not normal, and the more people terminate, the less incentive there is to provide appropriate support (it is after all, the mother's choice).
That is why two things are important, the right not to know, and a social fabric which provides appropriate support for parents who choose either not to know or to continue with pregnancies when they do know. If you uphold these rights, there is less chance of stigma and fear leading to medical terminations.