I didn't watch the programme but I read Sally Philips' long article in last Saturday's Weekend Guardian.
I think it should be entirely up to the parents as to whether they proceed with such a pregnancy. Not everybody feels able to take on the responsibility of caring for a special needs child and some Downs Sydrome children have quite severe learning difficulties and significant health issues.
Sally Phillips lives in a house with a "large garden" in south west London and I can't recall what her husband's job was reported to be, but it was a senior, professional job which no doubt is pretty well paid. Sally, as a well known actress, is probably quite well paid herself. Presumably they can afford to get additional support if they need it.
What about families, perhaps with other young children, where both parents work in only moderately paid and inflexible jobs. It is much harder for people with limited means to cope with the additional pressure of a child who will require much more attention and guidance and who is unlikely to be fully independent even after reaching adulthood.
In my opinion, it is a good thing that mothers can find out early in the pregnancy if they are carrying a Downs Sydrome child and make a decision as to whether they wish to continue with the pregnancy, rather than having to make such an agonising decision much later in the pregnancy.
I don't think parents should be pressured one way or the other as to what they should do. There will always be parents who will wish to continue with the pregnancy and I think they should be given every support possible - unfortunately that is not often very much.
I think it must be a most terrible dilemma for a parent and I don't believe that anyone should be accused of being "selfish"for having a Downs baby (as Richard Dawkins suggested a while back) or "greedy" for deciding not to.
My husband worked with people with learning disabilities, some of them with Downs. They were not all happy and gentle and easy-going. Like anyone else, they could at times be quite grumpy and difficult to cope with. When their parents got old or ill it could become difficult if a fully grown man in a temper started to throw his weight around. This was often when residential care became the only practical option. At that time the homes in which they lived were lovely - comfortable and homely, with big kitchens and home-cooked, nutritious food, regular parties and socials. A few years down the line, with the Council hit by cuts in government subsidies in this deprived area, one of the best of these homes was closed and the land sold by the council to make way for private flats. The residents were shipped out, separated from their special friends and the staff they trusted, and moved to a variety of other housing provisions. That is the reality of it for many people.