The major cost saving for airfield operators by going unlicenced is no fire crew. Not the saving on the CAA annual fee for licensed status. I would guess at many airfields this will give greater flexibility in staffing and multi tasking, though I know many airfields also use fire crew for other jobs close to the fire tender. But that factor alone is likely to reduce airfield overheads significantly as a proportion of total standing costs. The CAA analysis was a good one in terms of objective risk assessment based on empirical evidence.