Just found this article while looking for something else on line and thought others should see it too.  It's from the States so perhaps not a complete match for the UK nurse settings, but is the first thing I've seen in a while that sees the nurses role as integral to making progress on sustainable healthcare.

'On the basis of the holistic perspective of nursing, this article examines how environmental, psychological, ethical, political, and international health issues directly affect hospital efforts to go green.'

'... nurses represent the largest number of professionals in the healthcare field, with more than 2.9 million nurses in practice, and are some of the most trusted healthcare professionals.'

'Florence Nightingale stated, "No amount of medical knowledge will lessen the accountability of nurses to do, that is, manage the environment to promote positive life processes."4^(p380) This idea of accountability shifts the focus of the nurse's ability to promote "going green" to a responsibility, due to their job description.'

https://www.nursingcenter.com/journalarticle?Article_ID=848644&Journal_ID=54004&Issue_ID=847806

Hospitals Going Green: A Holistic View of the Issue and the Critical Role of the Nurse Leader