I've not read all this thread but i personally would not mind paying a few pounds for a medical if it would help stop unstable people from getting or renewing their gun license.
That is the real nub of it. Although I hate to say it and my colleagues will protest: what really needs to happen is that GPs need to be aware of FAC holders and be accountable if they do not inform the Police of any disturbing behaviour or risks. In the same way they do with the DVLA and drivers. Or the CAA and pilots who drink excessively or take drugs. There is a duty of care to society that over rules confidentiality. It remains to be seen if this new system will make much difference. I hope it does. Lets us not forget it could be your family on the wrong end of bullet and as firearms owners we all will suffer further regulation with any more atrocities.