Never is that permissible.
it isn't permissible, no, I didn't say it was permissible, but it happens all the time. But as I said, there is no justifiable explanation a teacher can give, so a little bit of gentle persistence from the parent is probably all it will take to get the child in, and once they are in there is not going to be any problem from the staff.
No teacher ever had performance management difficulties due to ill children in the school. All such data is crawled over and the odd child who pulls data down because of illness is excluded from the data for performance management. Worrying about Mortgage payments due to accepting an ill child? This is total hyperbole.
This is just total ignorance. It may work like that in some schools, but not others, in fact the school I have just left was in such dire financial straights that the lowest scoring department out of three or four creative departments was going to be closed. The department with the lowest number, no child will be excluded from the data, no explanations or reasons excepted, simply the number at the bottom of the balance sheet, that department will accept no further year 10 or year 12 students this year, and will close next year. If it is music or drama, that will be about 10 staff redundant. For this academic year they will be teaching partly outside their subject, as the department contracts, then next year gone.That is the reality.
I once lost my job because my year 9 class did not make an average of two sublevels of progress in their Sats ( this was a few years ago- but it illustrates the point) several of these children had degenerative conditions, they were terminally ill with conditions that meant their cognitive ability was declining. That was irrelevant, they were not excluded from the data.
In the school I am talking about I taught BTEC and GCSE in year 12 and 13. I was told to "give" a child with cancer a distinction. She had not done the distinction tasks, I gave her a merit. I was put into capability for this. Fortunately I didn't care! ( which was why my colleagues had passed that particular child on to me anyway, because I was the one who didn't care, and had taken such children before)
It wasn't just the child with cancer ( who completed the course) It was my retention rate too. Two children had dropped out. One was going on week long alcoholic binges with his uncle, the other had been accepted onto an apprenticeship. I knew he was applying for the apprenticeship when he enrolled, he told me I was a back up in case he was turned down. Technically, I should have rejected him, but it was not in his interests to do so, because he might have needed the back up!
Which of these three children would you have rejected? The alcoholic? the child with cancer or the child with other plans? I failed two consecutive targets because one child was in one class one year, and two were in the next class the next year, so I lost my job - I didn't care much.
That is not an unusual situation, and I am far from the only person in my circle that has had this experience.
Bubbles buddy, I think you are talking about totally different scenarios. For a start, up to Y11 a teacher cannot turn a child away anyway, that happens in Y12. Also children who have always had SEN, complex medical histories or absences are not really an issue, as if it affects their education, they will already have lower targets. The problem is someone who gets a target set on the basis of their performance in year 11, then gets cancer, and is unlikely to meet their target, and might even drop out of the course.