I finally retired from the NHS this April after 50 year. However I did Bank work for the last 10 years.
I wasn't a Nurse ( but a Cardiac Physiologist) we had to do Oncall for the Cath Labs.
I fully understand your dilemma I have lots of chums (including my own sister) who are Nurses.
I did not want to do on call anymore, dragged out of bed at some crazy hour, possibly stay in work then work a normal day, it was fine when I was much younger, but No not now.
However, I was able to take my pension and work Bank I would just tell them what I would work. A couple of my Nursing chums did similar but they went back part time, so an odd night shift or 12 hour shift wasn't so bad. They found it beneficial they took their pension, had a part time hours salary but they had time, the money overall was slightly better, as they didn't pay into the pension fund.
Best of luck hope you get a good outcome.