However, surges can be unpredictable and the duration can be prolonged and it is imperative that the system respond to accommodate in the best way possible. And sometimes that does mean having to cancel elective procedure or other functions. I worked during a large MCI where the sudden influx of patients quickly became everyones problem. And while I think we responded superbly as a ED and as a hospital at the time of the incident, the hospital functions were affected for many days. Many elective procedures had to be rescheduled (mostly surgical, since ortho had many many operative cases), including radiologic ones since radiologists had hundred of CTs and Xrays to read since in a 4 hour period there were more xrays and cts than in a normal 24 hour period. If there is a massive influx of flu, even if largely man-flu, we all know that flu can be devastating and deadly for many and those cases will certainly be mixed in with the garbage. Even if the overwhelming majority if folks with adult-baby syndrome, there WILL be truly sick people to be dealt with who will require beds. And if its between grandpa getting his new hip (and the bed afterward) vs. the grandma with sepsis, it a no brainer. There's limited resources and rationing in a "socialized" system, for sure. But, lets not pretend that there isn't limited resources and rationing here. It occurs everyday.
As far as your unfortunate shift, you and your PA upped your speed etc. We agree it was not safe, but it what was "needed" to be done with the resources you had. But, with proper planning at a system/departmental level, there would be a mechanism for calling in additional physicians or PAs to help manage rare surges in volume so you and the PA don't have to work at such a precarious pace. (We're not talking about a gradual increase in volume where you hire additional physicians or PAs.)
What it sounds like, is that the NHS is responding to a surge. Their overall response may not be the best or most thought out, but cancelling elective procedures to free up beds for those needing to be hospitalized seem totally reasonable.