Hospitals do not only have one OR or one surgeon or surgery team. So the likeliness of an emergency being told they would have to wait while someone else was having a planned section is extremely unlikely and I am sure as part of the new recommendations on the NHS they would have to ensure enough medical personal to ensure this would not happen. This would also ensure less cuts to medical staff.
A woman in need of an emergency c-sec will ALWAYS take priority. I was booked in for a planned c-sec and it was explained extensively to me that I would have to call in on the day to find out my admission time and my c-sec may have to be delayed depending on if there were any emergency c-secs which will take priority. ( I landed up going in as an emergency as my son had other plans and decided to come 2 weeks earlier)
The surgery itself is 45min to an hour max, so surgeons would not be in the OR all day and tied up, and as I just mentioned, I highly doubt there would only be one room or one surgery team.
Whats funny is that even in a normal delivery there are issues - enough midwives, enough beds available and mothers in labour being turned away - so if the argument is timing and availability - a planned c-sec is easier to ensure issues do not arise as you are booked in, staff are scheduled. And as its planned before you go into labour, if an emergency happens, you can wait.
Like so many have said - its choice, let those who need that choice have the right to make it, with all the info, make classes on c-secs available, educate women on the decision and support them in it, its their right. If they choose it and regret it - well its their bodies, their lives - Live and let live as well as live and learn.
xx