The quote from Laura Duffel I can find is
“It’s very different. That’s what makes it so much scarier for us as doctors, nurses and porters and everyone else who is working on the front line.
“We have children who are coming in. It was minimally affecting children in the first wave... we now have a whole ward of children here and I know that some of my colleagues are in the same position, where they have a whole ward of children with Covid.”
So from this, she is describing that there are a lot of children who have covid on her ward; and she has colleagues in a similar situation, also with a lot of children with covid on their ward.
However, this is very anecdotal; if this is just 2 wards throughout London then to could be that she is describing her experience on the wards, but it doesn't translate to raised figures overall.
There has been discussion in recent days of NHS staff being told that they can't speak to the media, and I can see why there is concern about worrying the public.
However, it also would concern me if whistleblowers weren't allowed to speak publicly if they are worried about the situation they see in front of them. I hope that we get facts and figures about this issue (and I hope that they are reassuring)