Who pays? The taxpayer, who presumably made a saving when the system was “rationalised” twenty years ago and CENSAR was created to save the money it apparently cost to allow pilots to cancel their VFR SARTIME with the relevant centre or tower unit on arrival at their destination. I guess this allowed the consolidation of a number of ATC desks as the workload of each controller reduced. Savings presumably were made and are still being made in spite of the number of SARTIMEs not cancelled.