From reading the article, it seems that the recommendation is that there should be a staff member with EYTS (an early years postgraduate qualification) in every nursery. EYTS is not the equivalent of a teaching qualification. I think it used to be called EYP (Early Years Practioner). The qualification was introduced a few years ago by Liz Truss, who wanted nurseries to be run with higher, but fewer staff. That idea was (rightly) opposed. I hope it's not returning. Truss was very impressed with French nurseries, which she claimed were more formal from an earlier age than most UK nurseries.
My two children went to a nursery full-time from the age of six months until they started primary school. There were five separate rooms, each of which provided activities suitable for the age/development of the child. Children weren't automatically moved to the next room unless it was appropriate for their developmental age. I can honestly say that both of them loved the experience and insisted on keeping in touch with staff for some years after they left.
Each of the rooms for the oldest children had graduates and the last room had a qualified primary teacher, who worked with the children in small groups for a short session two or three times a week, sitting round tables preparing them for primary school. Apart from that there was no formal learning, although the days in the last two years were quite structured. I don't think it did them any harm. They also used to help with tasks such as laying and clearing the table. As far as language was concerned, I think they used language more at the nursery than they would have done at home, because nursery staff aren't distracted by all the other things a stay at home mother has to do.
I don't know how staff structures in the nursery worked, but they were very knowledgeable on child development. One of my children sailed through all milestones, but the other one was more erratic. He was late to walk and had problems with speech/hearing, because he had glue ear. He benefited greatly from the small groups sessions and I know the staff always made an extra effort to make sure he'd heard what he'd been told to do. My children have kept in touch with some of the children who were in the same nursery. It's quite noticeable that most of them did better at school than average, but I don't know whether that's down to the nursery experience or the kind of families they generally come from.
Sorry about the length of this post, but I think it's important that people realise that some people have no choice but to send their children to full-time nursery. I think they should be as good as they can be. The real problem with them is the cost, which is prohibitive for most these days. They are increasingly becoming the preserve of the children of professionals with high salaries. Many nurseries are already closing, because they can't make ends meet, so I think some kind of rethink is needed. There's a vast difference between the kind of nursery my children attended and groups for children, who usually attend part-time, and whose parents want them to be more sociable and/or to give the parents more time.