wow so many replies while I was working! Thanks so much to you all.
The exam chairs come from the usual classrooms. The school hall, where the exams take place, is to be used for PE lessons.
Lots of parents have rung in and one has spoken to the school this morning who have advised they are looking into it. Turns out its the year 11s in the science block and the year 8s in the tech rooms (no idea what they are) that are all sat on stools.
The benches are fixed, gas taps and all that, so can't be taken out.
There are no funds, so whatever the solution is, we will have to crowdfund/beg. One of the parents is an occupational therapist, she is going to go to the school to assess what can be done that is good for the kids, so that is great news.
We have another parent who has a container full of chairs from a closed business, she is willing to lend, but it might be no use as the chairs will be so much lower than the science benches.
There are other local schools in the same position, and reading all the comments, this is happening all over the country, so I think the schools are talking to each other to get the "approved" solution for this.
Some have said that they are expecting covid to pop up and that either bubbles will have to be quarantined, or that teachers will have to stay home meaning the children cannot go in, that frees up standard classrooms periodically.
The guidance given to the schools is changing by the day!
I love the idea re the camping chairs and a clipboard, I will ask my DD if she wants to take one in next week, we have stacks in the shed.