What happens if another woman is using the luxury suite or the water-birthing suite at the exact wrong time?
I guess that could happen anywhere though private or nhs. All delivery rooms could be in use when a mum goes into labour wherever you book. Especially the water birthing rooms which tend to be less in number.
I'm sure all maternity hospitals have plans for this not sure what they are maybe the 14 post natal rooms can be turned into labour suites if needed? The important thing is the staff more than the rooms. Most rooms can be repurposed with the right monitors and equipment and I'm sure Meghan like Kate and all other royal mums of the past have a dedicated team all ready?
For comparison my nhs local hospital has 7 birthing rooms in a midwife lead unit the linked consultant unit (not the same site but the same trust) has 9 rooms, which if you think about how many women give birth on the nhs compared to private seems like the Kensington wing it isn't a unreasonable number to me. I can't find how many rooms the Portland or the Lindo Wing have for comparison.