One size for all!!
Visited a small Scottish aerodrome last week, they literally get 4 small aircraft a day. There are 2 controllers so that SCRATCOH is complied with, presumably fatigue breaks are taken after each movement so as not to cause a fight over the traffic.
This is possible due to massive subsidies to both airport and airline alike, paid for ultimately by the tax payers of Southern England who see vast amounts of cash disappear northwards to prop up the Scottish economy.