Thanks tiggytape.
If that's a legal fact then that's what has to be accepted.
I don't think it's logical though, or reasonable, or morally right.
If I was Perma I would have followed the same path as her (no choice really, what was she meant to do, turn down a grammar school place willy-nilly on the basis it couldn't possibly be for her DD, even though everyone in authority confirmed it was? I don't think so... and neither would 99% of other parents here either I suspect)
However, equally, if I was the mum of the current no1 on the list then I would be hopping mad about this. Just for the fact everyone up the list probably doesn't know right now doesn't mean they never will find out. I would not think the law was being fair to creat a place that had gone to someone 188 or whatever on the list.
Why and how does admin error trump exam performance? 
Does that not just pander to errors made in an adult/beaurocratic world (admin error, local authorities etc) instead of focussing on what's right or wrong at the level it really should... the rights of a child who would rightfully be entitled to any new creation of a place if it weren't for the adult mistake?
That no1 waiting list child would be losing more than Perma's DD even if they didn't know it (sorry Perma, I want to make it more in general because mentioning your name seems like I am having a go at you personally which I'm not, but I tried to write out "a child who was awarded a place by admin error but lost on appeal that subseqently appeals and wins", and it came out just a little bit long winded
)
But legal fact is legal fact and if what Tiggytape says is true then that's the law and legally correct.