At the moment the RF has 8 senior working Royals, plus a few cousins who do stuff. Keeping in mind the cousins are aging and 4 or the 8 are beyond retirement age.
How many were there when the Queen was crowned?
And how many when her Father was crowned?
I'm just trying to figure out what the RF looked like a generation or two ago?
Is it feasible for the RF to operate with just two couples in 10-15 years time, between the Charles & Anne aging and Williams kids being ready to step up?