While NHS trusts locally make the decisions about staffing levels, the RCN said there is a lack of national oversight about the reduction in staff numbers.
The organisation is calling on ministers to prevent NHS trusts from "continuing with this damaging agenda of cuts" that "impact on patient care".
More top news
Oxfam have released a 10-year review accessing the impact of their work after the Tsunami.
British pubs are still considered cornerstones of the community, but with an estimated 30 closures a week, is this tradition under threat?
The remarkable rescue of baby elephant Roi, who faced starvation after poachers killed its mother, was captured on film.