cant find screw to dis-assemble tap?

Trying to fix leaking tap. Can't find the screw that will reveal the interior to enable me to replace the washer. I have a mixer tap.I don't believe it is hidden under the red spot as that is very small and I don't believe it will come off.No other visible screws.The tap has a " gold " type band around the tap about two thirds of the way up. There is a possibility that the last remaining third ( the top ) of the tap may be a screw on / off type fitting which when unscrewed may reveal the retaining screw. Any ideas anyone please ?