I had two labours on nothing but gas and air. It was good. It's a shame if people can't be offered it.
Oh, I've read the article now. It seems a bit odd; it says that: It is not believed that any NHS staff have become ill as a result of long-term exposure to gas and air. It's been in use for decades, why have the risks to staff only just come to light?
I think some of the effects-anemia, failure to absorb B12 naturally develop in older people. So it might be difficult to clearly identify the cause, but perhaps they are now tracking back and finding some links.
Portable machines which are safer are available, but expensive.