ATCO Standards
Kansai,
Generally the standard is the same except that an ATCO medical is a CAA medical rather than one to JAA standards.
THe argument gets a little more difficult here as there is probably moer reason to insist that an ATCO does not possess a colour deficiency as they have to make decisions based on the colour of lights on the ground and in the air and upon colour displays in front of them. They do not have much of the technology, such as TCAS, that is being used in the arguement against the flight crew standard.
Why don't you give NATS a bell?
G